diff --git a/pkgs/applications/networking/syncthing012/default.nix b/pkgs/applications/networking/syncthing012/default.nix
new file mode 100644
index 000000000000..dcf5e30551c1
--- /dev/null
+++ b/pkgs/applications/networking/syncthing012/default.nix
@@ -0,0 +1,27 @@
+# This file was generated by go2nix.
+{ stdenv, lib, goPackages, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+
+with goPackages;
+
+buildGoPackage rec {
+  name = "syncthing-${version}";
+  version = "0.12.15";
+  rev = "v${version}";
+
+  buildFlags = "--tags noupgrade,release";
+  
+  goPackagePath = "github.com/syncthing/syncthing";
+
+  src = fetchgit {
+    inherit rev;
+    url = "https://github.com/syncthing/syncthing";
+    sha256 = "108w7gvm3nbbsgp3h5p84fj4ba0siaz932i7yyryly486gzvpm43";
+  };
+
+  goDeps = ./deps.json;
+
+  postPatch = ''
+    # Mostly a cosmetic change
+    sed -i 's,unknown-dev,${version},g' cmd/syncthing/main.go
+  '';
+}
diff --git a/pkgs/applications/networking/syncthing012/deps.json b/pkgs/applications/networking/syncthing012/deps.json
new file mode 100644
index 000000000000..75e10397017a
--- /dev/null
+++ b/pkgs/applications/networking/syncthing012/deps.json
@@ -0,0 +1,21 @@
+[
+  {
+    "include": "../../libs.json",
+    "packages": [
+      "github.com/bkaradzic/go-lz4",
+      "github.com/calmh/luhn",
+      "golang.org/x/text",
+      "github.com/kardianos/osext",
+      "github.com/vitrun/qart",
+      "github.com/calmh/du",
+      "github.com/calmh/xdr",
+      "github.com/juju/ratelimit",
+      "github.com/thejerf/suture",
+      "github.com/golang/snappy",
+      "github.com/rcrowley/go-metrics",
+      "github.com/syndtr/goleveldb",
+      "golang.org/x/crypto",
+      "golang.org/x/net"
+    ]
+  }
+]
diff --git a/pkgs/development/go-modules/libs.json b/pkgs/development/go-modules/libs.json
index ca1a5e495c7f..b0686f3205a3 100644
--- a/pkgs/development/go-modules/libs.json
+++ b/pkgs/development/go-modules/libs.json
@@ -1006,5 +1006,95 @@
       "rev": "535138d7bcd717d6531c701ef5933d98b1866257",
       "sha256": "1m7nc1gvv5yqnq8ii75f33485il6y6prf8gxl97dimsw94qccc5v"
     }
+  },
+  {
+    "goPackagePath": "github.com/bkaradzic/go-lz4",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/bkaradzic/go-lz4",
+      "rev": "74ddf82598bc4745b965729e9c6a463bedd33049",
+      "sha256": "1vdid8v0c2v2qhrg9rzn3l7ya1h34jirrxfnir7gv7w6s4ivdvc1"
+    }
+  },
+  {
+    "goPackagePath": "github.com/calmh/luhn",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/calmh/luhn",
+      "rev": "0c8388ff95fa92d4094011e5a04fc99dea3d1632",
+      "sha256": "1hfj1lx7wdpifn16zqrl4xml6cj5gxbn6hfz1f46g2a6bdf0gcvs"
+    }
+  },
+  {
+    "goPackagePath": "golang.org/x/text",
+    "fetch": {
+      "type": "git",
+      "url": "https://go.googlesource.com/text",
+      "rev": "5eb8d4684c4796dd36c74f6452f2c0fa6c79597e",
+      "sha256": "1cjwm2pv42dbfqc6ylr7jmma902zg4gng5aarqrbjf1k2nf2vs14"
+    }
+  },
+  {
+    "goPackagePath": "github.com/vitrun/qart",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/vitrun/qart",
+      "rev": "ccb109cf25f0cd24474da73b9fee4e7a3e8a8ce0",
+      "sha256": "0bhp768b8ha6f25dmhwn9q8m2lkbn4qnjf8n7pizk25jn5zjdvc8"
+    }
+  },
+  {
+    "goPackagePath": "github.com/calmh/du",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/calmh/du",
+      "rev": "3c0690cca16228b97741327b1b6781397afbdb24",
+      "sha256": "1mv6mkbslfc8giv47kyl97ny0igb3l7jya5hc75sm54xi6g205wa"
+    }
+  },
+  {
+    "goPackagePath": "github.com/calmh/xdr",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/calmh/xdr",
+      "rev": "e467b5aeb65ca8516fb3925c84991bf1d7cc935e",
+      "sha256": "1bi4b2xkjzcr0vq1wxz14i9943k71sj092dam0gdmr9yvdrg0nra"
+    }
+  },
+  {
+    "goPackagePath": "github.com/juju/ratelimit",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/juju/ratelimit",
+      "rev": "772f5c38e468398c4511514f4f6aa9a4185bc0a0",
+      "sha256": "02rs61ay6sq499lxxszjsrxp33m6zklds1xrmnr5fk73vpqfa28p"
+    }
+  },
+  {
+    "goPackagePath": "github.com/thejerf/suture",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/thejerf/suture",
+      "rev": "99c1f2d613756768fc4299acd9dc621e11ed3fd7",
+      "sha256": "094ksr2nlxhvxr58nbnzzk0prjskb21r86jmxqjr3rwg4rkwn6d4"
+    }
+  },
+  {
+    "goPackagePath": "github.com/golang/snappy",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/golang/snappy",
+      "rev": "723cc1e459b8eea2dea4583200fd60757d40097a",
+      "sha256": "0bprq0qb46f5511b5scrdqqzskqqi2z8b4yh3216rv0n1crx536h"
+    }
+  },
+  {
+    "goPackagePath": "github.com/syndtr/goleveldb",
+    "fetch": {
+      "type": "git",
+      "url": "https://github.com/syndtr/goleveldb",
+      "rev": "1a9d62f03ea92815b46fcaab357cfd4df264b1a0",
+      "sha256": "04ywbif36fiah4fw0x2abr5q3p4fdhi6q57d5icc2mz03q889vhb"
+    }
   }
 ]
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b9ceacfb948d..801a8d94d70d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14282,7 +14282,7 @@ in
 
   syncthing = callPackage ../applications/networking/syncthing { };
 
-  syncthing012 = goPackages.syncthing012.bin // { outputs = [ "bin" ]; };
+  syncthing012 = callPackage ../applications/networking/syncthing012 { };
 
   # linux only by now
   synergy = callPackage ../applications/misc/synergy { };
diff --git a/pkgs/top-level/go-packages.nix b/pkgs/top-level/go-packages.nix
index ff1ca2f853e5..8ac969a88772 100644
--- a/pkgs/top-level/go-packages.nix
+++ b/pkgs/top-level/go-packages.nix
@@ -3084,14 +3084,6 @@ let
     sha256 = "1m7nc1gvv5yqnq8ii75f33485il6y6prf8gxl97dimsw94qccc5v";
   };
 
-  relaysrv = buildFromGitHub rec {
-    rev    = "7fe1fdd8c751df165ea825bc8d3e895f118bb236";
-    owner  = "syncthing";
-    repo   = "relaysrv";
-    sha256 = "0qy14pa0z2dq5mix5ylv2raabwxqwj31g5kkz905wzki6d4j5lnp";
-    buildInputs = [ xdr syncthing-protocol011 ratelimit syncthing-lib ];
-  };
-
   reflectwalk = buildFromGitHub {
     rev    = "eecf4c70c626c7cfbb95c90195bc34d386c74ac6";
     owner  = "mitchellh";
@@ -3311,41 +3303,6 @@ let
     sha256 = "094ksr2nlxhvxr58nbnzzk0prjskb21r86jmxqjr3rwg4rkwn6d4";
   };
 
-  syncthing012 = buildFromGitHub rec {
-    version = "0.12.25";
-    rev = "v${version}";
-    owner = "syncthing";
-    repo = "syncthing";
-    sha256 = "108w7gvm3nbbsgp3h5p84fj4ba0siaz932i7yyryly486gzvpm43";
-    buildFlags = [ "-tags noupgrade,release" ];
-    disabled = isGo14;
-    buildInputs = [
-      go-lz4 du luhn xdr snappy ratelimit osext
-      goleveldb suture qart crypto net text rcrowley.go-metrics
-    ];
-    postPatch = ''
-      # Mostly a cosmetic change
-      sed -i 's,unknown-dev,${version},g' cmd/syncthing/main.go
-    '';
-  };
-
-  syncthing-lib = buildFromGitHub {
-    inherit (syncthing012) rev owner repo sha256;
-    subPackages = [ "lib/sync" ];
-    propagatedBuildInputs = syncthing012.buildInputs;
-  };
-
-  syncthing-protocol = buildFromGitHub {
-    inherit (syncthing012) rev owner repo sha256;
-    subPackages = [ "lib/protocol" ];
-    propagatedBuildInputs = [
-      go-lz4
-      logger
-      luhn
-      xdr
-      text ];
-  };
-
   syncthing-protocol011 = buildFromGitHub {
     rev = "84365882de255d2204d0eeda8dee288082a27f98";
     version = "2015-08-28";