diff --git a/pkgs/applications/display-managers/sddm/default.nix b/pkgs/applications/display-managers/sddm/default.nix
index 029501c7787a..091498fae003 100644
--- a/pkgs/applications/display-managers/sddm/default.nix
+++ b/pkgs/applications/display-managers/sddm/default.nix
@@ -25,6 +25,12 @@ in mkDerivation {
       url = "https://github.com/sddm/sddm/commit/e1dedeeab6de565e043f26ac16033e613c222ef9.patch";
       sha256 = "sha256-OPyrUI3bbH+PGDBfoL4Ohb4wIvmy9TeYZhE0JxR/D58=";
     })
+    # Fix build with Qt 5.15.3
+    # See: https://github.com/sddm/sddm/pull/1325
+    (fetchpatch {
+      url = "https://github.com/sddm/sddm/commit/e93bf95c54ad8c2a1604f8d7be05339164b19308.patch";
+      sha256 = "sha256:1rh6sdvzivjcl5b05fczarvxhgpjhi7019hvf2gadnwgwdg104r4";
+    })
   ];
 
   postPatch =
diff --git a/pkgs/development/libraries/qt-5/5.15/default.nix b/pkgs/development/libraries/qt-5/5.15/default.nix
index a1d5be70c012..183311c5f18a 100644
--- a/pkgs/development/libraries/qt-5/5.15/default.nix
+++ b/pkgs/development/libraries/qt-5/5.15/default.nix
@@ -2,15 +2,8 @@
 
 # Updates
 
-Before a major version update, make a copy of this directory. (We like to
-keep the old version around for a short time after major updates.) Add a
-top-level attribute to `top-level/all-packages.nix`.
-
-1. Update the URL in `pkgs/development/libraries/qt-5/$VERSION/fetch.sh`.
-2. From the top of the Nixpkgs tree, run
-   `./maintainers/scripts/fetch-kde-qt.sh pkgs/development/libraries/qt-5/$VERSION`.
-3. Check that the new packages build correctly.
-4. Commit the changes and open a pull request.
+Run `./fetch.sh` to update package sources from Git.
+Check for any minor version changes.
 
 */
 
@@ -28,58 +21,12 @@ top-level attribute to `top-level/all-packages.nix`.
 
 let
 
+  srcs = import ./srcs.nix { inherit lib fetchgit fetchFromGitHub; };
+
   qtCompatVersion = srcs.qtbase.version;
 
   stdenvActual = if stdenv.cc.isClang then llvmPackages_5.stdenv else stdenv;
 
-  mirror = "https://download.qt.io";
-  srcs = import ./srcs.nix { inherit fetchurl; inherit mirror; } // {
-    # qtwebkit does not have an official release tarball on the qt mirror and is
-    # mostly maintained by the community.
-    qtwebkit = rec {
-      src = fetchFromGitHub {
-        owner = "qt";
-        repo = "qtwebkit";
-        rev = "v${version}";
-        sha256 = "0x8rng96h19xirn7qkz3lydal6v4vn00bcl0s3brz36dfs0z8wpg";
-      };
-      version = "5.212.0-alpha4";
-    };
-    qtwebengine =
-      let
-        branchName = "5.15.6";
-        rev = "v${branchName}-lts";
-      in
-      {
-        version = "${branchName}-${lib.substring 0 7 rev}";
-
-        src = fetchgit {
-          url = "https://github.com/qt/qtwebengine.git";
-          sha256 = "17bw9yf04zmr9ck5jkrd435c8b03zpf937vn2nwgsr8p78wkg3kr";
-          inherit rev branchName;
-          fetchSubmodules = true;
-          leaveDotGit = true;
-          name = "qtwebengine-${lib.substring 0 7 rev}.tar.gz";
-          postFetch = ''
-            # remove submodule .git directory
-            rm -rf "$out/src/3rdparty/.git"
-
-            # compress to not exceed the 2GB output limit
-            # try to make a deterministic tarball
-            tar -I 'gzip -n' \
-              --sort=name \
-              --mtime=1970-01-01 \
-              --owner=root --group=root \
-              --numeric-owner --mode=go=rX,u+rw,a-s \
-              --transform='s@^@source/@' \
-              -cf temp  -C "$out" .
-            rm -r "$out"
-            mv temp "$out"
-          '';
-        };
-      };
-  };
-
   patches = {
     qtbase = lib.optionals stdenv.isDarwin [
       ./qtbase.patch.d/0001-qtbase-mkspecs-mac.patch
@@ -107,16 +54,6 @@ let
       ./qtbase.patch.d/0009-qtbase-qtpluginpath.patch
       ./qtbase.patch.d/0010-qtbase-assert.patch
       ./qtbase.patch.d/0011-fix-header_module.patch
-      (fetchpatch { # This can be removed when https://codereview.qt-project.org/c/qt/qtbase/+/339323 is included in an release.
-        name = "0014-gcc11-compat.patch";
-        url = "https://codereview.qt-project.org/gitweb?p=qt/qtbase.git;a=patch;h=049e14870c13235cd066758f29c42dc96c1ccdf8";
-        sha256 = "1cb2hwi859hds0fa2cbap014qaa7mah9p0rcxcm2cvj2ybl33qfc";
-      })
-      (fetchpatch { # This can be removed when https://codereview.qt-project.org/c/qt/qtbase/+/363880/3 is included in an release.
-        name = "qtbase-mysql-version-vs-functionality-check.patch";
-        url = "https://codereview.qt-project.org/gitweb?p=qt/qtbase.git;a=patch;h=211369133cf40b2f522caaff259c19069ed23ca4";
-        sha256 = "19kq9h10qm344fpdqa9basrbzh1y5kr48c6jzz3nvk61pk4ja1k4";
-      })
     ];
     qtdeclarative = [ ./qtdeclarative.patch ];
     qtscript = [ ./qtscript.patch ];
diff --git a/pkgs/development/libraries/qt-5/5.15/fetch.sh b/pkgs/development/libraries/qt-5/5.15/fetch.sh
old mode 100644
new mode 100755
index 81ceb3ef77ea..dcada3649078
--- a/pkgs/development/libraries/qt-5/5.15/fetch.sh
+++ b/pkgs/development/libraries/qt-5/5.15/fetch.sh
@@ -1,2 +1,17 @@
-WGET_ARGS=( http://download.qt.io/official_releases/qt/5.15/5.15.2/submodules/ \
-            -A '*.tar.xz' )
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p nix-prefetch-scripts jq
+
+set -eox pipefail
+
+here="$(dirname "${BASH_SOURCE[0]}")"
+modules="${here}/modules"
+srcs="${here}/srcs-generated.json"
+
+while read -r module; do
+    if [[ -z "$module" ]]; then continue; fi
+    url="https://invent.kde.org/qt/qt/${module}.git"
+    nix-prefetch-git --url $url --rev refs/heads/kde/5.15 \
+        | jq "{key: \"${module}\", value: {url,rev,sha256}}"
+done < "$modules" | jq -s 'from_entries' > "${srcs}.tmp"
+
+mv "${srcs}.tmp" "$srcs"
diff --git a/pkgs/development/libraries/qt-5/5.15/modules b/pkgs/development/libraries/qt-5/5.15/modules
new file mode 100644
index 000000000000..d6ce8822d541
--- /dev/null
+++ b/pkgs/development/libraries/qt-5/5.15/modules
@@ -0,0 +1,41 @@
+qt3d
+qtactiveqt
+qtandroidextras
+qtbase
+qtcharts
+qtconnectivity
+qtdatavis3d
+qtdeclarative
+qtdoc
+qtgamepad
+qtgraphicaleffects
+qtimageformats
+qtlocation
+qtlottie
+qtmacextras
+qtmultimedia
+qtnetworkauth
+qtpurchasing
+qtquick3d
+qtquickcontrols
+qtquickcontrols2
+qtquicktimeline
+qtremoteobjects
+qtscript
+qtscxml
+qtsensors
+qtserialbus
+qtserialport
+qtspeech
+qtsvg
+qttools
+qttranslations
+qtvirtualkeyboard
+qtwayland
+qtwebchannel
+qtwebglplugin
+qtwebsockets
+qtwebview
+qtwinextras
+qtx11extras
+qtxmlpatterns
diff --git a/pkgs/development/libraries/qt-5/5.15/srcs-generated.json b/pkgs/development/libraries/qt-5/5.15/srcs-generated.json
new file mode 100644
index 000000000000..76c4237dcaf7
--- /dev/null
+++ b/pkgs/development/libraries/qt-5/5.15/srcs-generated.json
@@ -0,0 +1,207 @@
+{
+  "qt3d": {
+    "url": "https://invent.kde.org/qt/qt/qt3d.git",
+    "rev": "7edec6e014de27b9dd03f63875c471aac606a918",
+    "sha256": "0qv4vhciigqd8bnqzrs7y71ls7jx1p9cal2rh78m42qgskk1ci59"
+  },
+  "qtactiveqt": {
+    "url": "https://invent.kde.org/qt/qt/qtactiveqt.git",
+    "rev": "f0d03da0e37a84029a4eae1733813521482ac1fb",
+    "sha256": "0llk76lf0mh4mzj7pwd8cs55wpmfq8v1bsdzvizb1sx0vfbjh8g6"
+  },
+  "qtandroidextras": {
+    "url": "https://invent.kde.org/qt/qt/qtandroidextras.git",
+    "rev": "8cce1098c59534352aa0f343ea73861f603ac04a",
+    "sha256": "130a1yda2m7pa10as3rccz84m3617422n6s51pdn4kp8p8rk7cs6"
+  },
+  "qtbase": {
+    "url": "https://invent.kde.org/qt/qt/qtbase.git",
+    "rev": "c9fde86b0a2440133bc08f4811b6ca793be47f0a",
+    "sha256": "1fqhdkv3sp3nbzqi2a5wvxn5d4v0xcrq2bl609bdyj4nx367a8wp"
+  },
+  "qtcharts": {
+    "url": "https://invent.kde.org/qt/qt/qtcharts.git",
+    "rev": "130463160b4923069eb98da49edaf7d93180f4f8",
+    "sha256": "19g35cddbfh307mk76wac1ps03warynlsj7xi8i596bxiaf7i4pw"
+  },
+  "qtconnectivity": {
+    "url": "https://invent.kde.org/qt/qt/qtconnectivity.git",
+    "rev": "69a87a9b831e36a578594a0a13130c384ad03121",
+    "sha256": "0ph07rdf9qfxnw3z2nqbmh6na65z0p2snmlzdw80amd7s0g255kw"
+  },
+  "qtdatavis3d": {
+    "url": "https://invent.kde.org/qt/qt/qtdatavis3d.git",
+    "rev": "c085311c02dd216e5a041b90c164d55b3cf3ce92",
+    "sha256": "0xya1m2csb42yisl90s9822p9q92n7ags909nlbapfsb49qwsqnj"
+  },
+  "qtdeclarative": {
+    "url": "https://invent.kde.org/qt/qt/qtdeclarative.git",
+    "rev": "55324650f9e759a43dce927f823c9858574106c3",
+    "sha256": "0cxz4pqvb8l0wqpc4hr0xmc72csqf7dpbbzdqgil9nyyg21ihkz0"
+  },
+  "qtdoc": {
+    "url": "https://invent.kde.org/qt/qt/qtdoc.git",
+    "rev": "897e90fe304d844beaf694b82a93a50237fa8b9e",
+    "sha256": "1c4m9vlgg6bfw7hwzanl5s4vslg0r7xiz50lanhqrlcrr9i36xs1"
+  },
+  "qtgamepad": {
+    "url": "https://invent.kde.org/qt/qt/qtgamepad.git",
+    "rev": "64afa18a0a1e9588060e2e6d917bb01ccdd48a81",
+    "sha256": "1h9yb0asprynnb2qyjbmyglrkk9f9v19g6zzpk0gmixrp0h8gk46"
+  },
+  "qtgraphicaleffects": {
+    "url": "https://invent.kde.org/qt/qt/qtgraphicaleffects.git",
+    "rev": "c36998dc1581167b12cc3de8e4ac68c2a5d9f76e",
+    "sha256": "0x11n2fym765z3gyb4xnfl7v6zrip1wjkkl6nx1bxaya173fvdw8"
+  },
+  "qtimageformats": {
+    "url": "https://invent.kde.org/qt/qt/qtimageformats.git",
+    "rev": "cb82c74310837fe4e832c8ab72176a5d63e4355f",
+    "sha256": "0j4cv5sa6mm3adcjw8cv6kbzrslmhjc1rgxqgc130l8vm3vmgbkr"
+  },
+  "qtlocation": {
+    "url": "https://invent.kde.org/qt/qt/qtlocation.git",
+    "rev": "861e372b6ad81570d4f496e42fb25a6699b72f2f",
+    "sha256": "1g24pg9v6sv5zf80r48innp3h4g0hss69hnr7ygfzfvfnmmn6g52"
+  },
+  "qtlottie": {
+    "url": "https://invent.kde.org/qt/qt/qtlottie.git",
+    "rev": "fa8c8bfc6742ab98b61d1351e054e0e73e9a42f4",
+    "sha256": "1xgykaw8qjnaip6h9jx0nfadc9amb6aclk758vm5pp43dvs5j96r"
+  },
+  "qtmacextras": {
+    "url": "https://invent.kde.org/qt/qt/qtmacextras.git",
+    "rev": "e72896968697e2a8af16a312e1560948e4c40f30",
+    "sha256": "1hndpbr1nnybn7frg76q99bk1c8fhvra6wjm0q78p4a8pinrvcms"
+  },
+  "qtmultimedia": {
+    "url": "https://invent.kde.org/qt/qt/qtmultimedia.git",
+    "rev": "bd29c87027637a013f2c5e3b549fcda84e4d7545",
+    "sha256": "11pz9zzrhsr3n78ga7l3kp3gi20rpxsa4iz3wclhcbcm2xr3nd94"
+  },
+  "qtnetworkauth": {
+    "url": "https://invent.kde.org/qt/qt/qtnetworkauth.git",
+    "rev": "53870ee9bb9117702cd1f11cb1c5d1cfc2d5394a",
+    "sha256": "0idaysqpwrghih7ijrm9hagj9jw3fy9nw539fr4d9rmcggnkkzn2"
+  },
+  "qtpurchasing": {
+    "url": "https://invent.kde.org/qt/qt/qtpurchasing.git",
+    "rev": "cbf444fb570ca4f4ca21d963d2ae4010f10d473e",
+    "sha256": "1cki7n62wqm3xxn36mka0y67ngn7jvjkrvr08vsassbjb7kfsmxp"
+  },
+  "qtquick3d": {
+    "url": "https://invent.kde.org/qt/qt/qtquick3d.git",
+    "rev": "3e3e53c834b25dc2959dd30f319d12d6f84ee1e3",
+    "sha256": "1b1khfg26zl3p28yvhwjfldqy3flh10pb5hm5z0av03rz7jy7l8s"
+  },
+  "qtquickcontrols": {
+    "url": "https://invent.kde.org/qt/qt/qtquickcontrols.git",
+    "rev": "cf3f6d7fec824cdf01f9b329ab3b92b1c0e0a420",
+    "sha256": "1vxp0kwigwhqyyfm0xg8llyd1l1f4l18hmk6xqkm57xpi15x55bc"
+  },
+  "qtquickcontrols2": {
+    "url": "https://invent.kde.org/qt/qt/qtquickcontrols2.git",
+    "rev": "be66bf9a5618c745d2a6ee2262967af6307b3b07",
+    "sha256": "11h3f3rb2kqgsw7njzhjwazw1k03v12i83irjndylafiaqw6c6ks"
+  },
+  "qtquicktimeline": {
+    "url": "https://invent.kde.org/qt/qt/qtquicktimeline.git",
+    "rev": "67503cdadea43b95ddad0de1a04951aff0ce1a07",
+    "sha256": "0h4b3ibcf6rsmqmcfbwbk9pbvw3b9cac8nx2538aqvnpyyp1vhid"
+  },
+  "qtremoteobjects": {
+    "url": "https://invent.kde.org/qt/qt/qtremoteobjects.git",
+    "rev": "4d6d1e35fb8e0cb900b5e5e9266edea51dc4f735",
+    "sha256": "1zbxl5jk7x8qklrnbbaikymyviigqdq7vf0wc8gzls4126vcx146"
+  },
+  "qtscript": {
+    "url": "https://invent.kde.org/qt/qt/qtscript.git",
+    "rev": "5cec94b2c1503f106f4ef4778d016410ebb86211",
+    "sha256": "1xdri98cw7m78k9kfb53cgh8wyz98q3i623jhhcv01rvy1zsf8m1"
+  },
+  "qtscxml": {
+    "url": "https://invent.kde.org/qt/qt/qtscxml.git",
+    "rev": "7a15000f42c7a3171719727cd056f82a78244ed7",
+    "sha256": "1i2ajsj9pb1s4lk4djj1h1ay9mkz1z3m75a747cspyc1p1iymipq"
+  },
+  "qtsensors": {
+    "url": "https://invent.kde.org/qt/qt/qtsensors.git",
+    "rev": "921a31375f29e429e95352b08b2b9dbfea663cb1",
+    "sha256": "1ijayk6lf34nwv7s3ib3cfqx9sjrmr1c6jnziwmxa1l6fy3ik4g8"
+  },
+  "qtserialbus": {
+    "url": "https://invent.kde.org/qt/qt/qtserialbus.git",
+    "rev": "8884c5e43df846deac5a0c7c290eeb633d6bfe32",
+    "sha256": "1ydb5x21j26pl58mr6klnwixkqx8h119nvnzvyawz83gji3ay3a5"
+  },
+  "qtserialport": {
+    "url": "https://invent.kde.org/qt/qt/qtserialport.git",
+    "rev": "941d1d8560d1f3e40077c251fbde6fd6a5b0f0d4",
+    "sha256": "0x7ly67gddmz0hqls9109bk4rgaa97ksyv24qk4brrhzkpr7q9cx"
+  },
+  "qtspeech": {
+    "url": "https://invent.kde.org/qt/qt/qtspeech.git",
+    "rev": "a0efc38377e5bf7eed2d354d1cb4d7a0d5dc7e1b",
+    "sha256": "1ljf45f65pfp8x367qnzl0ssz7n17cxhk29qvqpz9z7rh65zqix5"
+  },
+  "qtsvg": {
+    "url": "https://invent.kde.org/qt/qt/qtsvg.git",
+    "rev": "24128cdf8bef53eddf31a5709bbbc46293006b1c",
+    "sha256": "0vinjcbq4saxhlmvb5i93bzgg30qc3j8r2qfwrzaxc4vmfhfgi56"
+  },
+  "qttools": {
+    "url": "https://invent.kde.org/qt/qt/qttools.git",
+    "rev": "33693a928986006d79c1ee743733cde5966ac402",
+    "sha256": "02n0lppsp6g4s9bdvnfxpf7ndkbs9bzm0clcwvirwf2cd8q95a4n"
+  },
+  "qttranslations": {
+    "url": "https://invent.kde.org/qt/qt/qttranslations.git",
+    "rev": "8fbbdf21f127197f97b58c7d80d2fa2a59135638",
+    "sha256": "06r2jb2fsdr5fvxs748war0lr4mm3l3d3b37xc4n73y294vwrmn7"
+  },
+  "qtvirtualkeyboard": {
+    "url": "https://invent.kde.org/qt/qt/qtvirtualkeyboard.git",
+    "rev": "353b75b2e34bdae901625bbddf5c5e3f3e6c0de5",
+    "sha256": "12nv773zc05yrbai1z6i481yinih0kxcjzgm9pa0580qz69gd9a5"
+  },
+  "qtwayland": {
+    "url": "https://invent.kde.org/qt/qt/qtwayland.git",
+    "rev": "992833ca741efe8f533c61abfaf129a1d8bfcfee",
+    "sha256": "1w8mq38k6s0fncqv113bw1pc7g10ysfmsbyg23hxh9fr5q4ia4q7"
+  },
+  "qtwebchannel": {
+    "url": "https://invent.kde.org/qt/qt/qtwebchannel.git",
+    "rev": "47be9a51b01d9fd9e7f6dca81e98d4eedcec6d38",
+    "sha256": "167rp43c86xr4grzxs4bl46y6sf1q9xa0641mgp4r94g2ipxyc1d"
+  },
+  "qtwebglplugin": {
+    "url": "https://invent.kde.org/qt/qt/qtwebglplugin.git",
+    "rev": "550a8cee241bbf8c11863dec9587d579dcb1108b",
+    "sha256": "0p1y0b8zsm7rrkhhylndp282ghgki2cjrgc4n5zhjn732ahxg515"
+  },
+  "qtwebsockets": {
+    "url": "https://invent.kde.org/qt/qt/qtwebsockets.git",
+    "rev": "e7883bc64440b1ff4666272ac6eb710ee4bc221b",
+    "sha256": "1rj99y1f0wn6g1m2k53xkni5v79zgq25yv8b9wx2bz0n2r9iasca"
+  },
+  "qtwebview": {
+    "url": "https://invent.kde.org/qt/qt/qtwebview.git",
+    "rev": "920de5f1cd9f9001cfef1bfd2c19e6720793362f",
+    "sha256": "04hnqalabhypkd2hgl45jxf9p1p6dgjwlc5b7gs4f6588lafgd3f"
+  },
+  "qtwinextras": {
+    "url": "https://invent.kde.org/qt/qt/qtwinextras.git",
+    "rev": "3df03dab21f3e84d5a7274c64dd879854ca1bfe7",
+    "sha256": "12dkw982xcm7hxw3lxhg34wny4srbickxm9s3nz7bdyp9dmqnygx"
+  },
+  "qtx11extras": {
+    "url": "https://invent.kde.org/qt/qt/qtx11extras.git",
+    "rev": "3898f5484fd4864b047729bfeda9a1222f32364f",
+    "sha256": "04rp8arml19b03iybd7sa78dsdv7386m9ymmgqciwl13dhwjssra"
+  },
+  "qtxmlpatterns": {
+    "url": "https://invent.kde.org/qt/qt/qtxmlpatterns.git",
+    "rev": "189e28d0aff1f3d7960228ba318b83e3cadac98c",
+    "sha256": "0vs9j2i1dnlivcrzz175zz66ql1m8mrdqkglvyqjqv6cb7mpskrq"
+  }
+}
diff --git a/pkgs/development/libraries/qt-5/5.15/srcs.nix b/pkgs/development/libraries/qt-5/5.15/srcs.nix
index 70e9c3a80225..e254912b6009 100644
--- a/pkgs/development/libraries/qt-5/5.15/srcs.nix
+++ b/pkgs/development/libraries/qt-5/5.15/srcs.nix
@@ -1,342 +1,72 @@
-# DO NOT EDIT! This file is generated automatically.
-# Command: ./maintainers/scripts/fetch-kde-qt.sh pkgs/development/libraries/qt-5/5.15
-{ fetchurl, mirror }:
+{ lib, fetchgit, fetchFromGitHub }:
 
-{
-  qt3d = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qt3d-everywhere-src-5.15.2.tar.xz";
-      sha256 = "03ed6a48c813c75296c19f5d721184ab168280b69d2656cf16f877d3d4c55c1d";
-      name = "qt3d-everywhere-src-5.15.2.tar.xz";
-    };
+let
+  version = "5.15.3";
+  overrides = {
+    qtscript.version = "5.15.4";
   };
-  qtactiveqt = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtactiveqt-everywhere-src-5.15.2.tar.xz";
-      sha256 = "868161fee0876d17079cd5bed58d1667bf19ffd0018cbe515129f11510ad2a5c";
-      name = "qtactiveqt-everywhere-src-5.15.2.tar.xz";
+
+  mk = name: args:
+    let
+      override = overrides.${name} or {};
+    in
+    {
+      version = override.version or version;
+      src = override.src or
+        fetchgit {
+          inherit (args) url rev sha256;
+          fetchLFS = false;
+          fetchSubmodules = false;
+          deepClone = false;
+          leaveDotGit = false;
+        };
     };
-  };
-  qtandroidextras = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtandroidextras-everywhere-src-5.15.2.tar.xz";
-      sha256 = "5813278690d89a9c232eccf697fc280034de6f9f02a7c40d95ad5fcf8ac8dabd";
-      name = "qtandroidextras-everywhere-src-5.15.2.tar.xz";
+in
+lib.mapAttrs mk (lib.importJSON ./srcs-generated.json)
+// {
+  # qtwebkit does not have an official release tarball on the qt mirror and is
+  # mostly maintained by the community.
+  qtwebkit = rec {
+    src = fetchFromGitHub {
+      owner = "qt";
+      repo = "qtwebkit";
+      rev = "v${version}";
+      sha256 = "0x8rng96h19xirn7qkz3lydal6v4vn00bcl0s3brz36dfs0z8wpg";
     };
+    version = "5.212.0-alpha4";
   };
-  qtbase = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtbase-everywhere-src-5.15.2.tar.xz";
-      sha256 = "909fad2591ee367993a75d7e2ea50ad4db332f05e1c38dd7a5a274e156a4e0f8";
-      name = "qtbase-everywhere-src-5.15.2.tar.xz";
+
+  qtwebengine =
+    let
+      branchName = "5.15.6";
+      rev = "v${branchName}-lts";
+    in
+    {
+      version = "${branchName}-${lib.substring 0 7 rev}";
+
+      src = fetchgit {
+        url = "https://github.com/qt/qtwebengine.git";
+        sha256 = "17bw9yf04zmr9ck5jkrd435c8b03zpf937vn2nwgsr8p78wkg3kr";
+        inherit rev branchName;
+        fetchSubmodules = true;
+        leaveDotGit = true;
+        name = "qtwebengine-${lib.substring 0 7 rev}.tar.gz";
+        postFetch = ''
+          # remove submodule .git directory
+          rm -rf "$out/src/3rdparty/.git"
+
+          # compress to not exceed the 2GB output limit
+          # try to make a deterministic tarball
+          tar -I 'gzip -n' \
+            --sort=name \
+            --mtime=1970-01-01 \
+            --owner=root --group=root \
+            --numeric-owner --mode=go=rX,u+rw,a-s \
+            --transform='s@^@source/@' \
+            -cf temp  -C "$out" .
+          rm -r "$out"
+          mv temp "$out"
+        '';
+      };
     };
-  };
-  qtcharts = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtcharts-everywhere-src-5.15.2.tar.xz";
-      sha256 = "e0750e4195bd8a8b9758ab4d98d437edbe273cd3d289dd6a8f325df6d13f3d11";
-      name = "qtcharts-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtconnectivity = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtconnectivity-everywhere-src-5.15.2.tar.xz";
-      sha256 = "0380327871f76103e5b8c2a305988d76d352b6a982b3e7b3bc3cdc184c64bfa0";
-      name = "qtconnectivity-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtdatavis3d = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtdatavis3d-everywhere-src-5.15.2.tar.xz";
-      sha256 = "226a6575d573ad78aca459709722c496c23aee526aa0c38eb7c93b0bea1eb6fd";
-      name = "qtdatavis3d-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtdeclarative = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtdeclarative-everywhere-src-5.15.2.tar.xz";
-      sha256 = "c600d09716940f75d684f61c5bdaced797f623a86db1627da599027f6c635651";
-      name = "qtdeclarative-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtdoc = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtdoc-everywhere-src-5.15.2.tar.xz";
-      sha256 = "a47809f00f1bd690ca4e699cb32ffe7717d43da84e0167d1f562210da7714ce4";
-      name = "qtdoc-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtgamepad = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtgamepad-everywhere-src-5.15.2.tar.xz";
-      sha256 = "c77611f7898326d69176ad67a9b886f617cdedc368ec29f223d63537d25b075c";
-      name = "qtgamepad-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtgraphicaleffects = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtgraphicaleffects-everywhere-src-5.15.2.tar.xz";
-      sha256 = "ec8d67f64967d5046410490b549c576f9b9e8b47ec68594ae84aa8870173dfe4";
-      name = "qtgraphicaleffects-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtimageformats = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtimageformats-everywhere-src-5.15.2.tar.xz";
-      sha256 = "bf8285c7ce04284527ab823ddc7cf48a1bb79131db3a7127342167f4814253d7";
-      name = "qtimageformats-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtlocation = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtlocation-everywhere-src-5.15.2.tar.xz";
-      sha256 = "984fcb09e108df49a8dac35d5ce6dffc49caafd2acb1c2f8a5173a6a21f392a0";
-      name = "qtlocation-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtlottie = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtlottie-everywhere-src-5.15.2.tar.xz";
-      sha256 = "cec6095ab8f714e609d2ad3ea8c4fd819461ce8793adc42abe37d0f6dc432517";
-      name = "qtlottie-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtmacextras = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtmacextras-everywhere-src-5.15.2.tar.xz";
-      sha256 = "6959b0f2cec71cd66800f36cab797430860e55fa33c9c23698d6a08fc2b8776e";
-      name = "qtmacextras-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtmultimedia = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtmultimedia-everywhere-src-5.15.2.tar.xz";
-      sha256 = "0c3758810e5131aabcf76e4965e4c18b8911af54d9edd9305d2a8278d8346df5";
-      name = "qtmultimedia-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtnetworkauth = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtnetworkauth-everywhere-src-5.15.2.tar.xz";
-      sha256 = "fcc2ec42faa68561efa8f00cd72e662fbc06563ebc6de1dc42d96bb2997acd85";
-      name = "qtnetworkauth-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtpurchasing = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtpurchasing-everywhere-src-5.15.2.tar.xz";
-      sha256 = "87120d319ff2f8106e78971f7296d72a66dfe91e763d213199aea55046e93227";
-      name = "qtpurchasing-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtquick3d = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtquick3d-everywhere-src-5.15.2.tar.xz";
-      sha256 = "5b0546323365ce34e4716f22f305ebb4902e222c1a0910b65ee448443c2f94bb";
-      name = "qtquick3d-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtquickcontrols = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtquickcontrols-everywhere-src-5.15.2.tar.xz";
-      sha256 = "c393fb7384b1f047f10e91a6832cf3e6a4c2a41408b8cb2d05af2283e8549fb5";
-      name = "qtquickcontrols-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtquickcontrols2 = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtquickcontrols2-everywhere-src-5.15.2.tar.xz";
-      sha256 = "671b6ce5f4b8ecc94db622d5d5fb29ef4ff92819be08e5ea55bfcab579de8919";
-      name = "qtquickcontrols2-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtquicktimeline = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtquicktimeline-everywhere-src-5.15.2.tar.xz";
-      sha256 = "b9c247227607437acec7c7dd18ad46179d20369c9d22bdb1e9fc128dfb832a28";
-      name = "qtquicktimeline-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtremoteobjects = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtremoteobjects-everywhere-src-5.15.2.tar.xz";
-      sha256 = "6781b6bc90888254ea77ce812736dac00c67fa4eeb3095f5cd65e4b9c15dcfc2";
-      name = "qtremoteobjects-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtscript = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtscript-everywhere-src-5.15.2.tar.xz";
-      sha256 = "a299715369afbd1caa4d7fa2875d442eab91adcaacafce54a36922442624673e";
-      name = "qtscript-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtscxml = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtscxml-everywhere-src-5.15.2.tar.xz";
-      sha256 = "60b9590b9a41c60cee7b8a8c8410ee4625f0389c1ff8d79883ec5a985638a7dc";
-      name = "qtscxml-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtsensors = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtsensors-everywhere-src-5.15.2.tar.xz";
-      sha256 = "3f0011f9e9942cad119146b54d960438f4568a22a274cdad4fae06bb4e0e4839";
-      name = "qtsensors-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtserialbus = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtserialbus-everywhere-src-5.15.2.tar.xz";
-      sha256 = "aeeb7e5c0d3f8503215b22e1a84c0002ca67cf63862f6e3c6ef44a67ca31bd88";
-      name = "qtserialbus-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtserialport = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtserialport-everywhere-src-5.15.2.tar.xz";
-      sha256 = "59c559d748417306bc1b2cf2315c1e63eed011ace38ad92946af71f23e2ef79d";
-      name = "qtserialport-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtspeech = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtspeech-everywhere-src-5.15.2.tar.xz";
-      sha256 = "c810fb9eecb08026434422a32e79269627f3bc2941be199e86ec410bdfe883f5";
-      name = "qtspeech-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtsvg = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtsvg-everywhere-src-5.15.2.tar.xz";
-      sha256 = "8bc3c2c1bc2671e9c67d4205589a8309b57903721ad14c60ea21a5d06acb585e";
-      name = "qtsvg-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qttools = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qttools-everywhere-src-5.15.2.tar.xz";
-      sha256 = "c189d0ce1ff7c739db9a3ace52ac3e24cb8fd6dbf234e49f075249b38f43c1cc";
-      name = "qttools-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qttranslations = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qttranslations-everywhere-src-5.15.2.tar.xz";
-      sha256 = "d5788e86257b21d5323f1efd94376a213e091d1e5e03b45a95dd052b5f570db8";
-      name = "qttranslations-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtvirtualkeyboard = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtvirtualkeyboard-everywhere-src-5.15.2.tar.xz";
-      sha256 = "9a3193913be30f09a896e3b8c2f9696d2e9b3f88a63ae9ca8c97a2786b68cf55";
-      name = "qtvirtualkeyboard-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtwayland = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtwayland-everywhere-src-5.15.2.tar.xz";
-      sha256 = "193732229ff816f3aaab9a5e2f6bed71ddddbf1988ce003fe8dd84a92ce9aeb5";
-      name = "qtwayland-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtwebchannel = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtwebchannel-everywhere-src-5.15.2.tar.xz";
-      sha256 = "127fe79c43b386713f151ed7d411cd81e45e29f9c955584f29736f78c9303ec1";
-      name = "qtwebchannel-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtwebengine = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtwebengine-everywhere-src-5.15.2.tar.xz";
-      sha256 = "c8afca0e43d84f7bd595436fbe4d13a5bbdb81ec5104d605085d07545b6f91e0";
-      name = "qtwebengine-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtwebglplugin = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtwebglplugin-everywhere-src-5.15.2.tar.xz";
-      sha256 = "81e782b517ed29e10bea1aa90c9f59274c98a910f2c8b105fa78368a36b41446";
-      name = "qtwebglplugin-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtwebsockets = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtwebsockets-everywhere-src-5.15.2.tar.xz";
-      sha256 = "a0b42d85dd34ff6e2d23400e02f83d8b85bcd80e60efd1521d12d9625d4a233f";
-      name = "qtwebsockets-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtwebview = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtwebview-everywhere-src-5.15.2.tar.xz";
-      sha256 = "be9f46167e4977ead5ef5ecf883fdb812a4120f2436383583792f65557e481e7";
-      name = "qtwebview-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtwinextras = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtwinextras-everywhere-src-5.15.2.tar.xz";
-      sha256 = "65b8272005dec00791ab7d81ab266d1e3313a3bbd8e54e546d984cf4c4ab550e";
-      name = "qtwinextras-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtx11extras = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtx11extras-everywhere-src-5.15.2.tar.xz";
-      sha256 = "7014702ee9a644a5a93da70848ac47c18851d4f8ed622b29a72eed9282fc6e3e";
-      name = "qtx11extras-everywhere-src-5.15.2.tar.xz";
-    };
-  };
-  qtxmlpatterns = {
-    version = "5.15.2";
-    src = fetchurl {
-      url = "${mirror}/official_releases/qt/5.15/5.15.2/submodules/qtxmlpatterns-everywhere-src-5.15.2.tar.xz";
-      sha256 = "76ea2162a7c349188d7e7e4f6c77b78e8a205494c90fee3cea3487a1ae2cf2fa";
-      name = "qtxmlpatterns-everywhere-src-5.15.2.tar.xz";
-    };
-  };
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtbase.nix b/pkgs/development/libraries/qt-5/modules/qtbase.nix
index 0d82acc70929..44f08699824f 100644
--- a/pkgs/development/libraries/qt-5/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtbase.nix
@@ -115,6 +115,8 @@ stdenv.mkDerivation {
     sed -i '/PATHS.*NO_DEFAULT_PATH/ d' src/corelib/Qt5CoreMacros.cmake
     sed -i 's/NO_DEFAULT_PATH//' src/gui/Qt5GuiConfigExtras.cmake.in
     sed -i '/PATHS.*NO_DEFAULT_PATH/ d' mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
+  '' + lib.optionalString (compareVersion "5.15.0" >= 0) ''
+    patchShebangs ./bin
   '' + (
     if stdenv.isDarwin then ''
         sed -i \
@@ -149,6 +151,8 @@ stdenv.mkDerivation {
     ''}
 
     NIX_CFLAGS_COMPILE+=" -DNIXPKGS_QT_PLUGIN_PREFIX=\"$qtPluginPrefix\""
+  '' + lib.optionalString (compareVersion "5.15.0" >= 0) ''
+    ./bin/syncqt.pl -version $version
   '';
 
   postConfigure = ''
diff --git a/pkgs/development/libraries/qt-5/qtModule.nix b/pkgs/development/libraries/qt-5/qtModule.nix
index 767cbc91142d..12a9a85c7b79 100644
--- a/pkgs/development/libraries/qt-5/qtModule.nix
+++ b/pkgs/development/libraries/qt-5/qtModule.nix
@@ -31,6 +31,23 @@ mkDerivation (args // {
     ${args.preConfigure or ""}
 
     fixQtBuiltinPaths . '*.pr?'
+  '' + lib.optionalString (builtins.compareVersions "5.15.0" version <= 0)
+  # Note: We use ${version%%-*} to remove any tag from the end of the version
+  # string. Version tags are added by Nixpkgs maintainers and not reflected in
+  # the source version.
+  ''
+    if [[ -z "$dontCheckQtModuleVersion" ]] \
+        && grep -q '^MODULE_VERSION' .qmake.conf 2>/dev/null \
+        && ! grep -q -F "''${version%%-*}" .qmake.conf 2>/dev/null
+    then
+      echo >&2 "error: could not find version ''${version%%-*} in .qmake.conf"
+      echo >&2 "hint: check .qmake.conf and update the package version in Nixpkgs"
+      exit 1
+    fi
+
+    if [[ -z "$dontSyncQt" && -f sync.profile ]]; then
+      syncqt.pl -version "''${version%%-*}"
+    fi
   '';
 
   dontWrapQtApps = args.dontWrapQtApps or true;