diff --git a/pkgs/build-support/cabal/ghcjs.nix b/pkgs/build-support/cabal/ghcjs.nix
index 346165571d75..df356b6ac991 100644
--- a/pkgs/build-support/cabal/ghcjs.nix
+++ b/pkgs/build-support/cabal/ghcjs.nix
@@ -189,7 +189,7 @@ builtins.trace (ghc.parent.CabalGhcjs.version or null) {
                 done
               done
 
-              configureFlags+=" --package-db=/nix/store/a68nrd3slc39pgl4s3n485s6nfk3mnbi-haskell-ghcjs-ghc7.8.2-0.1.0-shared/share/ghcjs/x86_64-linux-0.1.0-7.8.2/package.conf.d"
+              configureFlags+=" --package-db=${ghc.ghc}/share/ghcjs/x86_64-linux-0.1.0-7.8.2/ghcjs/package.conf.d"
 
               ${optionalString (self.enableSharedExecutables && self.stdenv.isLinux) ''
                 configureFlags+=" --ghc-option=-optl=-Wl,-rpath=$out/lib/${ghc.ghc.name}/${self.pname}-${self.version}";
diff --git a/pkgs/development/compilers/ghcjs/0.1.0.nix b/pkgs/development/compilers/ghcjs/0.1.0.nix
new file mode 100644
index 000000000000..65d68a5089fb
--- /dev/null
+++ b/pkgs/development/compilers/ghcjs/0.1.0.nix
@@ -0,0 +1,72 @@
+{ cabal, filepath, HTTP, HUnit, mtl, network, QuickCheck, random, stm
+, testFramework, testFrameworkHunit, testFrameworkQuickcheck2, time
+, zlib, aeson, attoparsec, bzlib, dataDefault, ghcPaths, hashable
+, haskellSrcExts, haskellSrcMeta, lens, optparseApplicative_0_7_0_2
+, parallel, safe, shelly, split, stringsearch, syb, systemFileio
+, systemFilepath, tar, terminfo, textBinary, unorderedContainers
+, vector, wlPprintText, yaml, fetchgit, Cabal, CabalGhcjs, cabalInstall
+, regexPosix, alex, happy, git, gnumake, gcc, autoconf, patch
+, automake, libtool, cabalInstallGhcjs, gmp
+}:
+
+cabal.mkDerivation (self: rec {
+  pname = "ghcjs";
+  version = "0.1.0";
+  src = fetchgit {
+    url = git://github.com/ghcjs/ghcjs.git;
+    rev = "c9ce6b9d87296b1236d5ef0f7d5236b2cedcff84";
+    sha256 = "0cla5bchprc8g5n39fkssnv3lj378h948irsnr7dslaki6laaagw";
+  };
+  bootSrc = fetchgit {
+    url = git://github.com/ghcjs/ghcjs-boot.git;
+    rev = "2daaf8fc0efd5b5906a7157a172ce77ca3b28d81";
+    sha256 = "0kwn3lh196rp02kz2vxd0mkqyix99xqzs4vsazv0s49ari0dc4w8";
+  };
+  shims = fetchgit {
+    url = git://github.com/ghcjs/shims.git;
+    rev = "a6dd0202dcdb86ad63201495b8b5d9763483eb35";
+    sha256 = "07cd7ijw4i62iz1xjpwilriiybpqdx246w8d3j27ny1xfsj9wnax";
+  };
+  isLibrary = true;
+  isExecutable = true;
+  jailbreak = true;
+  noHaddock = true;
+  buildDepends = [
+    filepath HTTP mtl network random stm time zlib aeson attoparsec
+    bzlib dataDefault ghcPaths hashable haskellSrcExts haskellSrcMeta
+    lens optparseApplicative_0_7_0_2 parallel safe shelly split
+    stringsearch syb systemFileio systemFilepath tar terminfo textBinary
+    unorderedContainers vector wlPprintText yaml
+    alex happy git gnumake gcc autoconf automake libtool patch gmp
+  ];
+  testDepends = [
+    HUnit regexPosix testFramework testFrameworkHunit
+  ];
+  postConfigure = ''
+    echo Patching ghcjs with absolute paths to the Nix store
+    sed -i -e "s|getAppUserDataDirectory \"ghcjs\"|return \"$out/share/ghcjs\"|" \
+      src/Compiler/Info.hs
+    sed -i -e "s|str = \\[\\]|str = [\"--prefix=$out\", \"--libdir=$prefix/lib/$compiler\", \"--libsubdir=$pkgid\"]|" \
+      src-bin/Boot.hs
+  '';
+  postInstall = ''
+    export HOME=$(pwd)
+    cp -R ${bootSrc} ghcjs-boot
+    cd ghcjs-boot
+    ( cd boot ; chmod u+w . ; ln -s .. ghcjs-boot )
+    chmod -R u+w .              # because fetchgit made it read-only
+    local GHCJS_LIBDIR=$out/share/ghcjs/x86_64-linux-0.1.0-7.8.2
+    ensureDir $GHCJS_LIBDIR
+    cp -R ${shims} $GHCJS_LIBDIR/shims
+    ${cabalInstallGhcjs}/bin/cabal-js update
+    PATH=$out/bin:${CabalGhcjs}/bin:$PATH LD_LIBRARY_PATH=${gmp}/lib:${gcc.gcc}/lib64:$LD_LIBRARY_PATH \
+      env -u GHC_PACKAGE_PATH $out/bin/ghcjs-boot --init --with-cabal ${cabalInstallGhcjs}/bin/cabal-js --with-gmp-includes ${gmp}/include --with-gmp-libraries ${gmp}/lib
+  '';
+  meta = {
+    homepage = "https://github.com/ghcjs/ghcjs";
+    description = "GHCJS is a Haskell to JavaScript compiler that uses the GHC API";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [ self.stdenv.lib.maintainers.jwiegley ];
+  };
+})
diff --git a/pkgs/development/compilers/ghcjs/wrapper.nix b/pkgs/development/compilers/ghcjs/wrapper.nix
index fa1336fec27b..751b7d9a7de7 100644
--- a/pkgs/development/compilers/ghcjs/wrapper.nix
+++ b/pkgs/development/compilers/ghcjs/wrapper.nix
@@ -18,7 +18,7 @@ let
     PATH="$PATH:$2"
     IFS=":"
     for p in $PATH; do
-      for i in "$p/../share/ghcjs/$system-${ghcjs.version}-${ghcjs.ghc.version}"{,/lib}"/package.conf.d" "$p/../lib/ghcjs-${ghc.version}_ghc-${ghc.ghc.version}/package.conf.d" ; do
+      for i in "$p/../share/ghcjs/$system-${ghcjs.version}-${ghcjs.ghc.version}"{,/lib,/ghcjs}"/package.conf.d" "$p/../lib/ghcjs-${ghc.version}_ghc-${ghc.ghc.version}/package.conf.d" ; do
         # output takes place here
         test -f $i/package.cache && echo -n " $prefix$i"
       done
diff --git a/pkgs/development/libraries/haskell/ghcjs-dom/default.nix b/pkgs/development/libraries/haskell/ghcjs-dom/default.nix
index 7ea85f2cb1f5..b30bd4ff18b5 100644
--- a/pkgs/development/libraries/haskell/ghcjs-dom/default.nix
+++ b/pkgs/development/libraries/haskell/ghcjs-dom/default.nix
@@ -1,9 +1,14 @@
-{ cabal, ghcjsBase, mtl }:
+{ cabal, fetchgit, ghcjsBase, mtl }:
 
 cabal.mkDerivation (self: {
   pname = "ghcjs-dom";
-  version = "0.0.10";
-  sha256 = "0xffr197m6qam4q7ckgcwl0v9kwrxa5fm894c9vyxdmlcjyn38rm";
+  version = "0.1.0.0";
+  src = fetchgit {
+    url = git://github.com/ghcjs/ghcjs-dom.git;
+    rev = "81805e75ccd41501774b90c04efd9e00d52e9798";
+    sha256 = "3aa56fb81974533661aa056ed080edab29bef8ab26dae61999de4452f95949f6";
+  };
+
   buildDepends = [ ghcjsBase mtl ];
   meta = {
     description = "DOM library that supports both GHCJS and WebKitGTK";
diff --git a/pkgs/development/libraries/haskell/lens/default.nix b/pkgs/development/libraries/haskell/lens/4.2.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/lens/default.nix
rename to pkgs/development/libraries/haskell/lens/4.2.nix
diff --git a/pkgs/development/libraries/haskell/lens/4.4.nix b/pkgs/development/libraries/haskell/lens/4.4.nix
new file mode 100644
index 000000000000..3c05c94129eb
--- /dev/null
+++ b/pkgs/development/libraries/haskell/lens/4.4.nix
@@ -0,0 +1,32 @@
+{ cabal, bifunctors, comonad, contravariant, deepseq, distributive
+, doctest, exceptions, filepath, free, genericDeriving, hashable
+, hlint, HUnit, mtl, nats, parallel, primitive, profunctors
+, QuickCheck, reflection, semigroupoids, semigroups, simpleReflect
+, split, tagged, testFramework, testFrameworkHunit
+, testFrameworkQuickcheck2, testFrameworkTh, text, transformers
+, transformersCompat, unorderedContainers, vector, void, zlib
+}:
+
+cabal.mkDerivation (self: {
+  pname = "lens";
+  version = "4.4";
+  sha256 = "06ha4px4ywfbi0n3imy2qqjq3656snsz1b0ggkwzvdzmi550sh8w";
+  buildDepends = [
+    bifunctors comonad contravariant distributive exceptions filepath
+    free hashable mtl parallel primitive profunctors reflection
+    semigroupoids semigroups split tagged text transformers
+    transformersCompat unorderedContainers vector void zlib
+  ];
+  testDepends = [
+    deepseq doctest filepath genericDeriving hlint HUnit mtl nats
+    parallel QuickCheck semigroups simpleReflect split testFramework
+    testFrameworkHunit testFrameworkQuickcheck2 testFrameworkTh text
+    transformers unorderedContainers vector
+  ];
+  meta = {
+    homepage = "http://github.com/ekmett/lens/";
+    description = "Lenses, Folds and Traversals";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/development/libraries/haskell/transformers-compat/0.3.3.3.nix b/pkgs/development/libraries/haskell/transformers-compat/0.3.3.3.nix
new file mode 100644
index 000000000000..c0343aa6be79
--- /dev/null
+++ b/pkgs/development/libraries/haskell/transformers-compat/0.3.3.3.nix
@@ -0,0 +1,14 @@
+{ cabal, transformers }:
+
+cabal.mkDerivation (self: {
+  pname = "transformers-compat";
+  version = "0.3.3.3";
+  sha256 = "18cqghf0gc97j9qnlfnwwhvfm8j4sk99rm0xv3bf6ml8slk7njx7";
+  buildDepends = [ transformers ];
+  meta = {
+    homepage = "http://github.com/ekmett/transformers-compat/";
+    description = "A small compatibility shim exposing the new types from transformers 0.3 and 0.4 to older Haskell platforms.";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/development/tools/haskell/Cabal-ghcjs/default.nix b/pkgs/development/tools/haskell/Cabal-ghcjs/default.nix
index 6613adba19c6..16c355a5c996 100644
--- a/pkgs/development/tools/haskell/Cabal-ghcjs/default.nix
+++ b/pkgs/development/tools/haskell/Cabal-ghcjs/default.nix
@@ -8,8 +8,8 @@ cabal.mkDerivation (self: {
   version = "9e87d6a3";
   src = fetchgit {
     url = git://github.com/ghcjs/cabal.git;
-    rev = "9e87d6a39ec63f569fea899fc1ace332ea7eea78";
-    sha256 = "07bgsqzmiqzw14i91y5nmk5m9sqnxn503xzv2jan5g33z1vcwdcj";
+    rev = "520591876ee57dbecba1b2de602dc79f4f67ecce"; # Must be from the ghcjs branch
+    sha256 = "f59182661707c65a2a014aa91b5e0d53cbefb6c999c1982757f476619b6728c0";
   };
   preConfigure = "cd Cabal";
   configureFlags = "--program-suffix=-js";
diff --git a/pkgs/development/tools/haskell/cabal-install-ghcjs/default.nix b/pkgs/development/tools/haskell/cabal-install-ghcjs/default.nix
index 9102c77f2f68..4fde997fc4c8 100644
--- a/pkgs/development/tools/haskell/cabal-install-ghcjs/default.nix
+++ b/pkgs/development/tools/haskell/cabal-install-ghcjs/default.nix
@@ -6,13 +6,10 @@
 cabal.mkDerivation (self: {
   pname = "cabal-install-ghcjs";
   version = "9e87d6a3";
-  src = fetchgit {
-    url = git://github.com/ghcjs/cabal.git;
-    rev = "9e87d6a39ec63f569fea899fc1ace332ea7eea78";
-    sha256 = "07bgsqzmiqzw14i91y5nmk5m9sqnxn503xzv2jan5g33z1vcwdcj";
-  };
+  src = CabalGhcjs.src;
   isLibrary = true;
   isExecutable = true;
+  doCheck = false;
   configureFlags = "--program-suffix=-js";
   preConfigure = "cd cabal-install";
   buildDepends = [
diff --git a/pkgs/development/tools/haskell/ghcjs/default.nix b/pkgs/development/tools/haskell/ghcjs/default.nix
index 65d68a5089fb..4feffcd7f4c4 100644
--- a/pkgs/development/tools/haskell/ghcjs/default.nix
+++ b/pkgs/development/tools/haskell/ghcjs/default.nix
@@ -1,44 +1,72 @@
-{ cabal, filepath, HTTP, HUnit, mtl, network, QuickCheck, random, stm
+{ nodejs, cabal, filepath, HTTP, HUnit, mtl, network, QuickCheck, random, stm
 , testFramework, testFrameworkHunit, testFrameworkQuickcheck2, time
 , zlib, aeson, attoparsec, bzlib, dataDefault, ghcPaths, hashable
-, haskellSrcExts, haskellSrcMeta, lens, optparseApplicative_0_7_0_2
+, haskellSrcExts, haskellSrcMeta, lens, optparseApplicative
 , parallel, safe, shelly, split, stringsearch, syb, systemFileio
 , systemFilepath, tar, terminfo, textBinary, unorderedContainers
 , vector, wlPprintText, yaml, fetchgit, Cabal, CabalGhcjs, cabalInstall
 , regexPosix, alex, happy, git, gnumake, gcc, autoconf, patch
-, automake, libtool, cabalInstallGhcjs, gmp
+, automake, libtool, cabalInstallGhcjs, gmp, base16Bytestring
+, cryptohash, executablePath, transformersCompat
+, haddock, hspec, xhtml, primitive
 }:
-
 cabal.mkDerivation (self: rec {
   pname = "ghcjs";
   version = "0.1.0";
   src = fetchgit {
     url = git://github.com/ghcjs/ghcjs.git;
-    rev = "c9ce6b9d87296b1236d5ef0f7d5236b2cedcff84";
-    sha256 = "0cla5bchprc8g5n39fkssnv3lj378h948irsnr7dslaki6laaagw";
+    rev = "fd034b7e6fb61120d22f1c314398f37a673b8b1d";
+    sha256 = "0182bb706cc263a6d268eb61e243214186abae7b81dec420187c858e989c4dba";
   };
+/*
   bootSrc = fetchgit {
     url = git://github.com/ghcjs/ghcjs-boot.git;
-    rev = "2daaf8fc0efd5b5906a7157a172ce77ca3b28d81";
-    sha256 = "0kwn3lh196rp02kz2vxd0mkqyix99xqzs4vsazv0s49ari0dc4w8";
+    rev = "f9f79d0cf40212943bcc1ad2672f2e0a7af2b7c9";
+    sha256 = "83f1706bcf7e666f6fb6dee455517e0efb019aabd1393f444c80169f04b9d3b8";
   };
+*/
   shims = fetchgit {
     url = git://github.com/ghcjs/shims.git;
-    rev = "a6dd0202dcdb86ad63201495b8b5d9763483eb35";
-    sha256 = "07cd7ijw4i62iz1xjpwilriiybpqdx246w8d3j27ny1xfsj9wnax";
+    rev = "dc5bb54778f3dbba4b463f4f7df5f830f14d1cb6";
+    sha256 = "fcef2879df0735b1011a8642a7c3e0e3f39b7d395830b91a992658f4ff67c9ce";
   };
   isLibrary = true;
   isExecutable = true;
   jailbreak = true;
   noHaddock = true;
+  haddockInternal = cabal.mkDerivation (self: {
+    pname = "haddock-internal";
+    version = "2.14.3";
+    src = fetchgit {
+      url = git://github.com/ghcjs/haddock-internal.git;
+      rev = "47758773d6b20c395a1c76a93830070fde71dbab";
+      sha256 = "df1a024631b7781fcbda09d2b33a56650959b8ab6c831151b456133226ab90b2";
+    };
+    buildDepends = [ QuickCheck ghcPaths haddock hspec xhtml ]; # Can't specify Cabal here, or it ends up being the wrong version
+    doCheck = false;
+  });
+  ghcjsPrim = cabal.mkDerivation (self: {
+    pname = "ghcjs-prim";
+    version = "0.1.0.0";
+    src = fetchgit {
+      url = git://github.com/ghcjs/ghcjs-prim.git;
+      rev = "659d6ceb45b1b8ef526c7451d90afff80d76e2f5";
+      sha256 = "55b64d93cdc8220042a35ea12f8c53e82f78b51bc0f87ddd12300ad56e4b7ba7";
+    };
+    buildDepends = [ primitive ];
+  });
   buildDepends = [
     filepath HTTP mtl network random stm time zlib aeson attoparsec
     bzlib dataDefault ghcPaths hashable haskellSrcExts haskellSrcMeta
-    lens optparseApplicative_0_7_0_2 parallel safe shelly split
+    lens optparseApplicative parallel safe shelly split
     stringsearch syb systemFileio systemFilepath tar terminfo textBinary
     unorderedContainers vector wlPprintText yaml
     alex happy git gnumake gcc autoconf automake libtool patch gmp
+    base16Bytestring cryptohash executablePath haddockInternal
+    transformersCompat QuickCheck haddock hspec xhtml
+    ghcjsPrim
   ];
+  buildTools = [ nodejs git ];
   testDepends = [
     HUnit regexPosix testFramework testFrameworkHunit
   ];
@@ -51,8 +79,11 @@ cabal.mkDerivation (self: rec {
   '';
   postInstall = ''
     export HOME=$(pwd)
-    cp -R ${bootSrc} ghcjs-boot
+    export GIT_SSL_CAINFO=/etc/ssl/certs/ca-bundle.crt
+    git clone git://github.com/ghcjs/ghcjs-boot.git
     cd ghcjs-boot
+    git checkout f9f79d0cf40212943bcc1ad2672f2e0a7af2b7c9
+    git submodule update --init --recursive
     ( cd boot ; chmod u+w . ; ln -s .. ghcjs-boot )
     chmod -R u+w .              # because fetchgit made it read-only
     local GHCJS_LIBDIR=$out/share/ghcjs/x86_64-linux-0.1.0-7.8.2
@@ -60,7 +91,7 @@ cabal.mkDerivation (self: rec {
     cp -R ${shims} $GHCJS_LIBDIR/shims
     ${cabalInstallGhcjs}/bin/cabal-js update
     PATH=$out/bin:${CabalGhcjs}/bin:$PATH LD_LIBRARY_PATH=${gmp}/lib:${gcc.gcc}/lib64:$LD_LIBRARY_PATH \
-      env -u GHC_PACKAGE_PATH $out/bin/ghcjs-boot --init --with-cabal ${cabalInstallGhcjs}/bin/cabal-js --with-gmp-includes ${gmp}/include --with-gmp-libraries ${gmp}/lib
+      env -u GHC_PACKAGE_PATH $out/bin/ghcjs-boot --dev --with-cabal ${cabalInstallGhcjs}/bin/cabal-js --with-gmp-includes ${gmp}/include --with-gmp-libraries ${gmp}/lib
   '';
   meta = {
     homepage = "https://github.com/ghcjs/ghcjs";
diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 6d58eee927e9..defd7bfa54d5 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -221,6 +221,10 @@
     let parent = packages_ghc782.override {
           extension = self: super: {
             Cabal = packages_ghc782.CabalGhcjs;
+            transformersCompat = super.transformersCompat_0_3_3_3;
+            haddock = super.haddock.override {
+              Cabal = null;
+            };
           };
         };
     in packages {
@@ -229,27 +233,38 @@
       ghcWrapperPackage = import ../development/compilers/ghcjs/wrapper.nix;
       prefFun = self : super : super // {
         # This is the list of packages that are built into a booted ghcjs installation
-#        Cabal_1_19_2 = null;
-#        Cabal = self.Cabal_1_19_2;
-        Cabal = packages_ghc782.CabalGhcjs;
-        aeson_0_7_0_4 = null;
-        aeson = self.aeson_0_7_0_4;
+        # It can be generated with the command:
+        # nix-shell '<nixpkgs>' -A pkgs.haskellPackages_ghcjs.ghc --command "ghcjs-pkg list | sed -n 's/^    \(.*\)-\([0-9.]*\)$/\1_\2/ p' | sed 's/\./_/g' | sed 's/-\(.\)/\U\1/' | sed 's/^\([^_]*\)\(.*\)$/\1\2 = null;\n\1 = self.\1\2;/'"
+        Cabal_1_21_0_0 = null;
+        Cabal = self.Cabal_1_21_0_0;
+        aeson_0_8_0_0 = null;
+        aeson = self.aeson_0_8_0_0;
         array_0_5_0_0 = null;
         array = self.array_0_5_0_0;
-        attoparsec_0_11_3_1 = null;
-        attoparsec = self.attoparsec_0_11_3_1;
-        base_4_7_0_0 = null;
-        base = self.base_4_7_0_0;
-        bytestring_0_10_4_0 = null;
-        bytestring = self.bytestring_0_10_4_0;
+        async_2_0_1_5 = null;
+        async = self.async_2_0_1_5;
+        attoparsec_0_12_1_0 = null;
+        attoparsec = self.attoparsec_0_12_1_0;
+        base_4_7_0_1 = null;
+        base = self.base_4_7_0_1;
+        binary_0_7_2_1 = null;
+        binary = self.binary_0_7_2_1;
+        rts_1_0 = null;
+        rts = self.rts_1_0;
+        # bytestring_0_10_4_1 = null;
+        # bytestring = self.bytestring_0_10_4_1;
+        caseInsensitive_1_2_0_0 = null;
+        caseInsensitive = self.caseInsensitive_1_2_0_0;
         containers_0_5_5_1 = null;
         containers = self.containers_0_5_5_1;
         deepseq_1_3_0_2 = null;
         deepseq = self.deepseq_1_3_0_2;
         directory_1_2_1_0 = null;
         directory = self.directory_1_2_1_0;
-        dlist_0_7_1 = null;
-        dlist = self.dlist_0_7_1;
+        dlist_0_7_0_1 = null;
+        dlist = self.dlist_0_7_0_1;
+        extensibleExceptions_0_1_1_3 = null;
+        extensibleExceptions = self.extensibleExceptions_0_1_1_3;
         filepath_1_3_0_2 = null;
         filepath = self.filepath_1_3_0_2;
         ghcPrim_0_3_1_0 = null;
@@ -258,42 +273,75 @@
         ghcjsBase = self.ghcjsBase_0_1_0_0;
         ghcjsPrim_0_1_0_0 = null;
         ghcjsPrim = self.ghcjsPrim_0_1_0_0;
-        hashable_1_2_1_0 = null;
-        hashable = self.hashable_1_2_1_0;
+        hashable_1_2_2_0 = null;
+        hashable = self.hashable_1_2_2_0;
         integerGmp_0_5_1_0 = null;
         integerGmp = self.integerGmp_0_5_1_0;
-        mtl_2_1_3_1 = null;
-        mtl = self.mtl_2_1_3_1;
+        mtl_2_2_1 = null;
+        mtl = self.mtl_2_2_1;
         oldLocale_1_0_0_6 = null;
         oldLocale = self.oldLocale_1_0_0_6;
+        oldTime_1_1_0_2 = null;
+        oldTime = self.oldTime_1_1_0_2;
+        parallel_3_2_0_4 = null;
+        parallel = self.parallel_3_2_0_4;
         pretty_1_1_1_1 = null;
         pretty = self.pretty_1_1_1_1;
         primitive_0_5_3_0 = null;
         primitive = self.primitive_0_5_3_0;
-        # process_1_2_0_0 = null;
-        # process = self.process_1_2_0_0;
-        scientific_0_2_0_2 = null;
-        scientific = self.scientific_0_2_0_2;
+        process_1_2_0_0 = null;
+        process = self.process_1_2_0_0;
+        scientific_0_3_3_0 = null;
+        scientific = self.scientific_0_3_3_0;
+        stm_2_4_3 = null;
+        stm = self.stm_2_4_3;
         syb_0_4_2 = null;
         syb = self.syb_0_4_2;
-        templateHaskell_2_9_0_0 = null;
-        templateHaskell = self.templateHaskell_2_9_0_0;
+        # templateHaskell_2_9_0_0 = null;
+        # templateHaskell = self.templateHaskell_2_9_0_0;
         text_1_1_1_3 = null;
         text = self.text_1_1_1_3;
         time_1_4_2 = null;
         time = self.time_1_4_2;
-        transformers_0_3_0_0 = null;
-        transformers = self.transformers_0_3_0_0;
+        transformers_0_4_1_0 = null;
+        transformers = self.transformers_0_4_1_0;
         unix_2_7_0_1 = null;
         unix = self.unix_2_7_0_1;
         unorderedContainers_0_2_5_0 = null;
         unorderedContainers = self.unorderedContainers_0_2_5_0;
         vector_0_10_11_0 = null;
         vector = self.vector_0_10_11_0;
-        # These are necessary for compatibility with ghcjs's default libs
-        transformersCompat = self.transformersCompat_0_3_3;
-        oldTime = self.oldTime_1_1_0_2;
-        process = self.process_1_2_0_0; # ghcjs-boot seems to install process incorrectly, for some reason, so reinstall it
+
+        # This is necessary because haskell-packages will refuse to generate tfRandom for this version of ghc (0.1.0)
+        #TODO: haskell-packages shouldn't use the ghcjs version as the ghc version
+        tfRandom = self.callPackage ../development/libraries/haskell/tf-random {};
+
+/*
+        buildLocalCabalWithArgs = { src, name, args ? {}, cabalDrvArgs ? { jailbreak = true; }, cabal2nix ? packages_ghc782.cabal2nix }: let
+          cabalExpr = pkgs.stdenv.mkDerivation ({
+            name = "${name}.nix";
+
+            buildCommand = ''
+            ${cabal2nix}/bin/cabal2nix ${src + "/${name}.cabal"} --sha256=FILTERME \
+                | grep -v FILTERME | sed \
+                  -e 's/licenses.proprietary/licenses.unfree/' \
+                  -e 's/{ cabal/{ cabal, cabalInstall, cabalDrvArgs ? {}, src/' \
+                  -e 's/cabal.mkDerivation (self: {/cabal.mkDerivation (self: cabalDrvArgs \/\/ {/' \
+                  -e 's/buildDepends = \[/buildDepends = \[ cabalInstall/' \
+                  -e 's/pname = \([^\n]*\)/pname = \1\n  inherit src;\n/'  > $out
+            '';
+
+          } // pkgs.lib.optionalAttrs pkgs.stdenv.isLinux {
+            LANG = "en_US.UTF-8";
+            LOCALE_ARCHIVE = "${pkgs.glibcLocales}/lib/locale/locale-archive";
+          });
+        in self.callPackage cabalExpr ({ inherit src cabalDrvArgs; } // args);
+*/
+      };
+      extension = self: super: {
+        buildLocalCabalWithArgs = args: super.buildLocalCabalWithArgs (args // {
+          cabal2nix = packages_ghc782.cabal2nix;
+        });
       };
     };
 
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index f0f561c9c967..4ca039d0d673 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -847,7 +847,7 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
     Cabal = self.Cabal_1_18_1_3;
   };
 
-  ghcjsDom = callPackage ../development/libraries/haskell/ghcjs-codemirror {};
+  ghcjsDom = callPackage ../development/libraries/haskell/ghcjs-dom {};
 
   ghcjsCodemirror = callPackage ../development/libraries/haskell/ghcjs-codemirror {};
 
@@ -1342,7 +1342,9 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   lazysmallcheck = callPackage ../development/libraries/haskell/lazysmallcheck {};
 
-  lens = callPackage ../development/libraries/haskell/lens {};
+  lens_4_2 = callPackage ../development/libraries/haskell/lens/4.2.nix {};
+  lens_4_4 = callPackage ../development/libraries/haskell/lens/4.4.nix {};
+  lens = self.lens_4_4;
 
   lensDatetime = callPackage ../development/libraries/haskell/lens-datetime {};
 
@@ -2328,6 +2330,7 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
   transformersBase = callPackage ../development/libraries/haskell/transformers-base {};
 
   transformersCompat_0_3_3 = callPackage ../development/libraries/haskell/transformers-compat/0.3.3.nix {};
+  transformersCompat_0_3_3_3 = callPackage ../development/libraries/haskell/transformers-compat/0.3.3.3.nix {};
   transformersCompat_0_3_3_4 = callPackage ../development/libraries/haskell/transformers-compat/0.3.3.4.nix {};
   transformersCompat = self.transformersCompat_0_3_3_4;
 
@@ -2788,12 +2791,12 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
   cabal2nix = callPackage ../development/tools/haskell/cabal2nix {};
 
   # Build a cabal package given a local .cabal file
-  buildLocalCabalWithArgs = { src, name, args ? {}, cabalDrvArgs ? { jailbreak = true; } }: let
+  buildLocalCabalWithArgs = { src, name, args ? {}, cabalDrvArgs ? { jailbreak = true; }, cabal2nix }: let
     cabalExpr = pkgs.stdenv.mkDerivation ({
       name = "${name}.nix";
 
       buildCommand = ''
-      ${self.cabal2nix}/bin/cabal2nix ${src + "/${name}.cabal"} --sha256=FILTERME \
+      ${cabal2nix}/bin/cabal2nix ${src + "/${name}.cabal"} --sha256=FILTERME \
           | grep -v FILTERME | sed \
             -e 's/licenses.proprietary/licenses.unfree/' \
             -e 's/{ cabal/{ cabal, cabalInstall, cabalDrvArgs ? {}, src/' \