diff --git a/default.nix b/default.nix
index 7f9e2c8..ccf1a65 100644
--- a/default.nix
+++ b/default.nix
@@ -10,8 +10,8 @@ let
   miso = nixpkgs.fetchFromGitHub {
     owner = "dmjio";
     repo = "miso";
-    rev = "a9c4f0a3a6e7d87f9432dc6cf4b1d0c052bf7ef1";
-    sha256 = "1yq5y4vffslm6abnfnggp5m3k6vla6mzcwmhmm23l8yizsvdkwv2";
+    rev = "630e823dd40a434b73124e12b229a79d9fefb01d";
+    sha256 = "046gdp3ah2lsipfcy89rh20mn08xbhcgrj549v8zzy69j33xjm2l";
   };
   miso-jsaddle = super: if haskellPackages.ghc.isGhcjs or false then (super.callPackage (miso + "/miso-ghcjs.nix") {}) else (super.callPackage (miso + "/miso-ghc-jsaddle.nix") {});
 
@@ -31,37 +31,37 @@ in
     jsaddle-warp = nixpkgs.haskell.lib.dontCheck (super.callPackage (jsaddle + "/jsaddle-warp") {});
     jsaddle = super.callPackage (jsaddle + "/jsaddle") {};
     miso = miso-jsaddle super;
-    doctest = null; # Not compilable with ghcjs
-    comonad = dontCheck super.comonad;
-    Glob = dontCheck super.Glob;
-    SHA = dontCheck super.SHA;
-    iproute = dontCheck super.iproute;
-    semigroupoids = dontCheck super.semigroupoids;
-    wai-app-static = dontCheck super.wai-app-static;
-    attoparsec = dontCheck super.attoparsec;
-    http-date = dontCheck super.http-date;
-    lens = dontCheck super.lens;
-    unix-time = dontCheck super.unix-time;
-    http-types = dontCheck super.http-types;
-    servant = dontCheck super.servant;
-    servant-server = dontCheck super.servant-server;
-    servant-auth-docs = dontCheck super.servant-auth-docs;
-    lens-aeson = dontCheck super.lens-aeson;
-    word8 = dontCheck super.word8;
-    http2 = dontCheck super.http2;
-    wai-extra = dontCheck super.wai-extra;
-    pgp-wordlist = dontCheck super.pgp-wordlist;
-    prettyprinter = dontCheck super.prettyprinter;
-    unliftio = dontCheck super.unliftio;
-    prettyprinter-ansi-terminal = dontCheck super.prettyprinter-ansi-terminal;
-    distributive = dontCheck super.distributive;
-    genvalidity-property = dontCheck super.genvalidity-property;
-    genvalidity-hspec = dontCheck super.genvalidity-hspec;
-    genvalidity = dontCheck super.genvalidity;
-    megaparsec = dontCheck super.megaparsec;
-    ncurses = null;
-    haskeline = super.callHackage "haskeline" "0.7.4.2" {};
-    terminfo = super.callHackage "terminfo" "0.4.1.1" {};
+    # doctest = null; # Not compilable with ghcjs
+    # comonad = dontCheck super.comonad;
+    # Glob = dontCheck super.Glob;
+    # SHA = dontCheck super.SHA;
+    # iproute = dontCheck super.iproute;
+    # semigroupoids = dontCheck super.semigroupoids;
+    # wai-app-static = dontCheck super.wai-app-static;
+    # attoparsec = dontCheck super.attoparsec;
+    # http-date = dontCheck super.http-date;
+    # lens = dontCheck super.lens;
+    # unix-time = dontCheck super.unix-time;
+    # http-types = dontCheck super.http-types;
+    # servant = dontCheck super.servant;
+    # servant-server = dontCheck super.servant-server;
+    # servant-auth-docs = dontCheck super.servant-auth-docs;
+    # lens-aeson = dontCheck super.lens-aeson;
+    # word8 = dontCheck super.word8;
+    # http2 = dontCheck super.http2;
+    # wai-extra = dontCheck super.wai-extra;
+    # pgp-wordlist = dontCheck super.pgp-wordlist;
+    # prettyprinter = dontCheck super.prettyprinter;
+    # unliftio = dontCheck super.unliftio;
+    # prettyprinter-ansi-terminal = dontCheck super.prettyprinter-ansi-terminal;
+    # distributive = dontCheck super.distributive;
+    # genvalidity-property = dontCheck super.genvalidity-property;
+    # genvalidity-hspec = dontCheck super.genvalidity-hspec;
+    # genvalidity = dontCheck super.genvalidity;
+    # megaparsec = dontCheck super.megaparsec;
+    # ncurses = null;
+    # haskeline = super.callHackage "haskeline" "0.7.4.2" {};
+    # terminfo = super.callHackage "terminfo" "0.4.1.1" {};
   };
   tools = with haskellPackages; [
     ghcid
diff --git a/frontend/frontend.cabal b/frontend/frontend.cabal
index 1f11653..5d63e6e 100644
--- a/frontend/frontend.cabal
+++ b/frontend/frontend.cabal
@@ -20,7 +20,6 @@ executable frontend
   -- other-modules:
   -- other-extensions:
   build-depends:       base >=4.11 && <4.12
-                     , common
                      , miso
                      , jsaddle-warp
                      , mtl
diff --git a/nixpkgs-version.json b/nixpkgs-version.json
index 404acd5..11bb483 100644
--- a/nixpkgs-version.json
+++ b/nixpkgs-version.json
@@ -1,7 +1,7 @@
 {
   "url": "https://github.com/nixos/nixpkgs.git",
-  "rev": "e0d250e5cf6d179e1ccc775472d89718f61fcfd1",
+  "rev": "4507926b80c6b8f73053775ffee17f6781c7e7c8",
   "date": "2018-01-08T11:52:28+01:00",
-  "sha256": "1iqpjz4czcpghbv924a5h4jvfmj6c8q6sl3b1z7blz3mi740aivs",
+  "sha256": "068v9xh7d8klk62p2qwr76fyfqfh1bp08xc12x138g5q6pg6yfzb",
   "fetchSubmodules": true
 }
diff --git a/release.nix b/release.nix
index db007a4..85cea01 100644
--- a/release.nix
+++ b/release.nix
@@ -2,12 +2,39 @@
 
 let
 
+  config = {
+    packageOverrides = pkgs: with pkgs.haskell.lib;  with pkgs.lib; {
+      haskell = pkgs.haskell // {
+        packages = pkgs.haskell.packages // {
+          ghcjs84 = pkgs.haskell.packages.ghcjs84.override {
+            overrides = self: super: {
+              doctest = null;
+              directory-tree = dontCheck (super.directory-tree);
+              http-types = dontCheck (super.http-types);
+              tasty-quickcheck = dontCheck (super.tasty-quickcheck);
+              scientific = dontCheck (super.scientific);
+              servant = dontCheck (super.servant);
+              jsaddle-warp = super.callPackage ./jsaddle-warp-ghcjs.nix {};
+              ghc = overrideDerivation (super.ghc.override {
+                ghcjsSrc = pkgs.fetchgit {
+                  url = "https://github.com/ghcjs/ghcjs.git";
+                  rev = "dc190b1bb2453cfa484124e9f335ee3cad1492f7";
+                  sha256 = "0dh52aj0f3700zfyrhisy44b6y9p1bsawwrmd5pllpdyw21zd9lw";
+                  fetchSubmodules = true;
+                };
+              }) (drv: { patches = (drv.patches or []) ++ [ ./ghcjs.patch ]; });
+            };
+          };
+        };
+      };
+    };
+  };
   pinnedVersion = nixpkgs.lib.importJSON ./nixpkgs-version.json;
   pinnedPkgs = import (nixpkgs.fetchFromGitHub {
     owner = "NixOS";
     repo = "nixpkgs";
     inherit (pinnedVersion) rev sha256;
-  }) {};
+  }) { inherit config; };
   inherit (pinnedPkgs) pkgs;
 
   in