diff --git a/pkgs/misc/vscode-extensions/default.nix b/pkgs/misc/vscode-extensions/default.nix
index cd1d4ab28505..6e70852fdc21 100644
--- a/pkgs/misc/vscode-extensions/default.nix
+++ b/pkgs/misc/vscode-extensions/default.nix
@@ -1,248 +1,254 @@
-{ stdenv, callPackage, vscode-utils, llvmPackages_8, llvmPackages_latest }:
+{ stdenv, config, lib, callPackage, vscode-utils, llvmPackages_8, llvmPackages_latest }:
 
 let
   inherit (vscode-utils) buildVscodeMarketplaceExtension;
+
+  #
+  # Unless there is a good reason not to, we attempt to use the same name as the
+  # extension's unique identifier (the name the extension gets when installed
+  # from vscode under `~/.vscode`) and found on the marketplace extension page.
+  # So an extension's attribute name should be of the form:
+  # "${mktplcRef.publisher}.${mktplcRef.name}".
+  #
+  self = stdenv.lib.mapAttrs (_n: stdenv.lib.recurseIntoAttrs)
+    {
+
+      alanz.vscode-hie-server = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "vscode-hie-server";
+          publisher = "alanz";
+          version = "0.0.27"; # see the note above
+          sha256 = "1mz0h5zd295i73hbji9ivla8hx02i4yhqcv6l4r23w3f07ql3i8h";
+        };
+        meta = {
+          license = stdenv.lib.licenses.mit;
+        };
+      };
+
+      bbenoist.Nix = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "Nix";
+          publisher = "bbenoist";
+          version = "1.0.1";
+          sha256 = "0zd0n9f5z1f0ckzfjr38xw2zzmcxg1gjrava7yahg5cvdcw6l35b";
+        };
+        meta = with stdenv.lib; {
+          license = licenses.mit;
+        };
+      };
+
+      cmschuetz12.wal = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "wal";
+          publisher = "cmschuetz12";
+          version = "0.1.0";
+          sha256 = "0q089jnzqzhjfnv0vlb5kf747s3mgz64r7q3zscl66zb2pz5q4zd";
+        };
+        meta = with stdenv.lib; {
+          license = licenses.mit;
+        };
+      };
+
+      dhall.dhall-lang = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "dhall-lang";
+          publisher = "dhall";
+          version = "0.0.4";
+          sha256 = "0sa04srhqmngmw71slnrapi2xay0arj42j4gkan8i11n7bfi1xpf";
+        };
+        meta = { license = stdenv.lib.licenses.mit; };
+      };
+
+      dhall.vscode-dhall-lsp-server = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "vscode-dhall-lsp-server";
+          publisher = "dhall";
+          version = "0.0.4";
+          sha256 = "1zin7s827bpf9yvzpxpr5n6mv0b5rhh3civsqzmj52mdq365d2js";
+        };
+        meta = { license = stdenv.lib.licenses.mit; };
+      };
+
+      formulahendry.auto-close-tag = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "auto-close-tag";
+          publisher = "formulahendry";
+          version = "0.5.6";
+          sha256 = "058jgmllqb0j6gg5anghdp35nkykii28igfcwqgh4bp10pyvspg0";
+        };
+        meta = {
+          license = stdenv.lib.licenses.mit;
+        };
+      };
+
+      haskell.haskell = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "haskell";
+          publisher = "haskell";
+          version = "1.1.0";
+          sha256 = "1wg06lyk0qn9jd6gi007sg7v0z9z8gwq7x2449d4ihs9n3w5l0gb";
+        };
+        meta = with stdenv.lib; {
+          license = licenses.mit;
+        };
+      };
+
+      james-yu.latex-workshop = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "latex-workshop";
+          publisher = "James-Yu";
+          version = "8.2.0";
+          sha256 = "1ai16aam4v5jzhxgms589q0l24kyk1a9in6z4i7g05b3sahyxab2";
+        };
+        meta = with stdenv.lib; {
+          license = licenses.mit;
+        };
+      };
+
+      justusadam.language-haskell = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "language-haskell";
+          publisher = "justusadam";
+          version = "3.2.1";
+          sha256 = "0lxp8xz17ciy93nj4lzxqvz71vw1zdyamrnh2n792yair8890rr6";
+        };
+        meta = {
+          license = stdenv.lib.licenses.bsd3;
+        };
+      };
+
+      ms-azuretools.vscode-docker = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "vscode-docker";
+          publisher = "ms-azuretools";
+          version = "0.8.1";
+          sha256 = "0n59whmcrx8946xix6skvc50f2vsc85ckvn8cs06w9mqmymm1q0s";
+        };
+        meta = {
+          license = stdenv.lib.licenses.mit;
+        };
+      };
+
+      ms-kubernetes-tools.vscode-kubernetes-tools = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "vscode-kubernetes-tools";
+          publisher = "ms-kubernetes-tools";
+          version = "1.0.6";
+          sha256 = "12a4phl1pddsajy3n0ld6rp607iy0pif6pqrs6ljbg2x97fyra28";
+        };
+        meta = {
+          license = stdenv.lib.licenses.mit;
+        };
+      };
+
+      ms-vscode.Go = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "Go";
+          publisher = "ms-vscode";
+          version = "0.11.7";
+          sha256 = "1l6jjdfivw1pn9y4d4i7zf80ls1k1b0ap1d828ah57ad3bgmyqfi";
+        };
+        meta = {
+          license = stdenv.lib.licenses.mit;
+        };
+      };
+
+      ms-vscode.cpptools = callPackage ./cpptools {};
+
+      ms-vscode-remote.remote-ssh = callPackage ./remote-ssh {};
+
+      ms-python.python = callPackage ./python {
+        extractNuGet = callPackage ./python/extract-nuget.nix { };
+      };
+
+      redhat.vscode-yaml = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "vscode-yaml";
+          publisher = "redhat";
+          version = "0.5.3";
+          sha256 = "03swlsp906rqlrx6jf3ibh7pk36sm0zdr8jfy6sr3w5lqjg27gka";
+        };
+        meta = {
+          license = stdenv.lib.licenses.mit;
+        };
+      };
+
+      matklad.rust-analyzer = callPackage ./rust-analyzer {};
+
+      scala-lang.scala = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "scala";
+          publisher = "scala-lang";
+          version = "0.4.5";
+          sha256 = "0nrj32a7a86vwc9gfh748xs3mmfwbc304dp7nks61f0lx8b4wzxw";
+        };
+        meta = {
+          license = stdenv.lib.licenses.mit;
+        };
+      };
+
+      scalameta.metals = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "metals";
+          publisher = "scalameta";
+          version = "1.9.6";
+          sha256 = "12sjzk64kz7z8zqh3zg1dyb3v4c5xxgi1ain1jvw8hwf0hicqlgi";
+        };
+        meta = {
+          license = stdenv.lib.licenses.asl20;
+        };
+      };
+
+      skyapps.fish-vscode = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "fish-vscode";
+          publisher = "skyapps";
+          version = "0.2.1";
+          sha256 = "0y1ivymn81ranmir25zk83kdjpjwcqpnc9r3jwfykjd9x0jib2hl";
+        };
+        meta = with stdenv.lib; {
+          license = licenses.mit;
+        };
+      };
+
+      vadimcn.vscode-lldb = callPackage ./vscode-lldb {
+        lldb = llvmPackages_latest.lldb;
+      };
+
+      ms-vsliveshare.vsliveshare = callPackage ./ms-vsliveshare-vsliveshare {};
+
+      vscodevim.vim = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "vim";
+          publisher = "vscodevim";
+          version = "1.11.3";
+          sha256 = "1smzsgcrkhghbnpy51gp28kh74l7y4s2m8pfxabb4ffb751254j0";
+        };
+        meta = {
+          license = stdenv.lib.licenses.mit;
+        };
+      };
+
+      xaver.clang-format = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "clang-format";
+          publisher = "xaver";
+          version = "1.9.0";
+          sha256 = "abd0ef9176eff864f278c548c944032b8f4d8ec97d9ac6e7383d60c92e258c2f";
+        };
+        meta = with stdenv.lib; {
+          license = licenses.mit;
+          maintainers = [ maintainers.zeratax ];
+        };
+      };
+
+      llvm-org.lldb-vscode = llvmPackages_8.lldb;
+
+      WakaTime.vscode-wakatime = callPackage ./wakatime {};
+    } // lib.optionalAttrs (config.allowAliases or true) (
+    with self; {
+      # aliases
+    }
+  );
 in
-#
-# Unless there is a good reason not to, we attempt to use the same name as the
-# extension's unique identifier (the name the extension gets when installed
-# from vscode under `~/.vscode`) and found on the marketplace extension page.
-# So an extension's attribute name should be of the form:
-# "${mktplcRef.publisher}.${mktplcRef.name}".
-#
-stdenv.lib.mapAttrs (_n: stdenv.lib.recurseIntoAttrs)
-{
-
-  alanz.vscode-hie-server = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "vscode-hie-server";
-      publisher = "alanz";
-      version = "0.0.27"; # see the note above
-      sha256 = "1mz0h5zd295i73hbji9ivla8hx02i4yhqcv6l4r23w3f07ql3i8h";
-    };
-    meta = {
-      license = stdenv.lib.licenses.mit;
-    };
-  };
-
-  bbenoist.Nix = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-        name = "Nix";
-        publisher = "bbenoist";
-        version = "1.0.1";
-        sha256 = "0zd0n9f5z1f0ckzfjr38xw2zzmcxg1gjrava7yahg5cvdcw6l35b";
-    };
-    meta = with stdenv.lib; {
-      license = licenses.mit;
-    };
-  };
-
-  cmschuetz12.wal = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-        name = "wal";
-        publisher = "cmschuetz12";
-        version = "0.1.0";
-        sha256 = "0q089jnzqzhjfnv0vlb5kf747s3mgz64r7q3zscl66zb2pz5q4zd";
-    };
-    meta = with stdenv.lib; {
-      license = licenses.mit;
-    };
-  };
-
-  dhall.dhall-lang = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "dhall-lang";
-      publisher = "dhall";
-      version = "0.0.4";
-      sha256 = "0sa04srhqmngmw71slnrapi2xay0arj42j4gkan8i11n7bfi1xpf";
-    };
-    meta = { license = stdenv.lib.licenses.mit; };
-  };
-
-  dhall.vscode-dhall-lsp-server = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "vscode-dhall-lsp-server";
-      publisher = "dhall";
-      version = "0.0.4";
-      sha256 = "1zin7s827bpf9yvzpxpr5n6mv0b5rhh3civsqzmj52mdq365d2js";
-    };
-    meta = { license = stdenv.lib.licenses.mit; };
-  };
-
-  formulahendry.auto-close-tag = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "auto-close-tag";
-      publisher = "formulahendry";
-      version = "0.5.6";
-      sha256 = "058jgmllqb0j6gg5anghdp35nkykii28igfcwqgh4bp10pyvspg0";
-    };
-    meta = {
-      license = stdenv.lib.licenses.mit;
-    };
-  };
-
-  haskell.haskell = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "haskell";
-      publisher = "haskell";
-      version = "1.1.0";
-      sha256 = "1wg06lyk0qn9jd6gi007sg7v0z9z8gwq7x2449d4ihs9n3w5l0gb";
-    };
-    meta = with stdenv.lib; {
-      license = licenses.mit;
-    };
-  };
-
-  james-yu.latex-workshop = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "latex-workshop";
-      publisher = "James-Yu";
-      version = "8.2.0";
-      sha256 = "1ai16aam4v5jzhxgms589q0l24kyk1a9in6z4i7g05b3sahyxab2";
-    };
-    meta = with stdenv.lib; {
-      license = licenses.mit;
-    };
-  };
-
-  justusadam.language-haskell = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "language-haskell";
-      publisher = "justusadam";
-      version = "3.2.1";
-      sha256 = "0lxp8xz17ciy93nj4lzxqvz71vw1zdyamrnh2n792yair8890rr6";
-    };
-    meta = {
-      license = stdenv.lib.licenses.bsd3;
-    };
-  };
-
-  ms-azuretools.vscode-docker = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "vscode-docker";
-      publisher = "ms-azuretools";
-      version = "0.8.1";
-      sha256 = "0n59whmcrx8946xix6skvc50f2vsc85ckvn8cs06w9mqmymm1q0s";
-    };
-    meta = {
-      license = stdenv.lib.licenses.mit;
-    };
-  };
-
-  ms-kubernetes-tools.vscode-kubernetes-tools = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "vscode-kubernetes-tools";
-      publisher = "ms-kubernetes-tools";
-      version = "1.0.6";
-      sha256 = "12a4phl1pddsajy3n0ld6rp607iy0pif6pqrs6ljbg2x97fyra28";
-    };
-    meta = {
-      license = stdenv.lib.licenses.mit;
-    };
-  };
-
-  ms-vscode.Go = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "Go";
-      publisher = "ms-vscode";
-      version = "0.11.7";
-      sha256 = "1l6jjdfivw1pn9y4d4i7zf80ls1k1b0ap1d828ah57ad3bgmyqfi";
-    };
-    meta = {
-      license = stdenv.lib.licenses.mit;
-    };
-  };
-
-  ms-vscode.cpptools = callPackage ./cpptools {};
-
-  ms-vscode-remote.remote-ssh = callPackage ./remote-ssh {};
-
-  ms-python.python = callPackage ./python {
-    extractNuGet = callPackage ./python/extract-nuget.nix { };
-  };
-
-  redhat.vscode-yaml = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "vscode-yaml";
-      publisher = "redhat";
-      version = "0.5.3";
-      sha256 = "03swlsp906rqlrx6jf3ibh7pk36sm0zdr8jfy6sr3w5lqjg27gka";
-    };
-    meta = {
-      license = stdenv.lib.licenses.mit;
-    };
-  };
-
-  matklad.rust-analyzer = callPackage ./rust-analyzer {};
-
-  scala-lang.scala = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "scala";
-      publisher = "scala-lang";
-      version = "0.4.5";
-      sha256 = "0nrj32a7a86vwc9gfh748xs3mmfwbc304dp7nks61f0lx8b4wzxw";
-    };
-    meta = {
-      license = stdenv.lib.licenses.mit;
-    };
-  };
-
-  scalameta.metals = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "metals";
-      publisher = "scalameta";
-      version = "1.9.6";
-      sha256 = "12sjzk64kz7z8zqh3zg1dyb3v4c5xxgi1ain1jvw8hwf0hicqlgi";
-    };
-    meta = {
-      license = stdenv.lib.licenses.asl20;
-    };
-  };
-
-  skyapps.fish-vscode = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "fish-vscode";
-      publisher = "skyapps";
-      version = "0.2.1";
-      sha256 = "0y1ivymn81ranmir25zk83kdjpjwcqpnc9r3jwfykjd9x0jib2hl";
-    };
-    meta = with stdenv.lib; {
-      license = licenses.mit;
-    };
-  };
-
-  vadimcn.vscode-lldb = callPackage ./vscode-lldb {
-    lldb = llvmPackages_latest.lldb;
-  };
-
-  ms-vsliveshare.vsliveshare = callPackage ./ms-vsliveshare-vsliveshare {};
-
-  vscodevim.vim = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "vim";
-      publisher = "vscodevim";
-      version = "1.11.3";
-      sha256 = "1smzsgcrkhghbnpy51gp28kh74l7y4s2m8pfxabb4ffb751254j0";
-    };
-    meta = {
-      license = stdenv.lib.licenses.mit;
-    };
-  };
-
-  xaver.clang-format = buildVscodeMarketplaceExtension {
-    mktplcRef = {
-      name = "clang-format";
-      publisher = "xaver";
-      version = "1.9.0";
-      sha256 = "abd0ef9176eff864f278c548c944032b8f4d8ec97d9ac6e7383d60c92e258c2f";
-    };
-    meta = with stdenv.lib; {
-      license = licenses.mit;
-      maintainers = [ maintainers.zeratax ];
-    };
-  };
-
-  llvm-org.lldb-vscode = llvmPackages_8.lldb;
-
-  WakaTime.vscode-wakatime = callPackage ./wakatime {};
-}
+self