Build serially.

Author: dmjio

.travis.yml

@@ -13,9 +13,5 @@ matrix:
     - env: GHCVER=ghc8101
     - env: GHCVER=ghcHEAD
 
-before_install:
- - nix-channel --list
- - nix-channel --update
-
 script:
- - nix-build --argstr compiler $GHCVER
+ - nix-build --argstr compiler $GHCVER -j1

default.nix

@@ -10,7 +10,7 @@ let
     self: super: {
       network = dontCheck (super.network);
       network_3_1_1_1 = dontCheck (super.network_3_1_1_1);
-      Diff = super.Diff_0_4_0;
+      Diff = self.Diff_0_4_0;
     };
   ghc = pkgs.haskell.packages.${compiler}.override { inherit overrides; };
   language-ecmascript = ghc.callCabal2nix "language-ecmascript" ./. {};