* buildEnv: use $SHELL (i.e. bash) rather than /bin/sh. This allows

NixOS VM tests to be built on Ubuntu, where /bin/sh is dash rather
  than bash.

svn path=/nixpkgs/trunk/; revision=24592

pkgs/build-support/buildenv/builder.pl

@@ -10,7 +10,6 @@ STDOUT->autoflush(1);
 
 my $out = $ENV{"out"};
 
-
 my @pathsToLink = split ' ', $ENV{"pathsToLink"};
 
 sub isInPathsToLink {
@@ -153,7 +152,3 @@ my $manifest = $ENV{"manifest"};
 if ($manifest) {
     symlink($manifest, "$out/manifest") or die "cannot create manifest";
 }
-
-
-system("eval \"\$postBuild\"") == 0
-    or die "post-build hook failed";

pkgs/build-support/buildenv/default.nix

@@ -2,7 +2,7 @@
 # a fork of the buildEnv in the Nix distribution.  Most changes should
 # eventually be merged back into the Nix distribution.
 
-{stdenv, perl}:
+{ perl, runCommand }:
 
 { name
 
@@ -25,8 +25,9 @@
   postBuild ? ""
 }:
 
-stdenv.mkDerivation {
-  inherit name manifest paths ignoreCollisions pathsToLink postBuild;
-  realBuilder = "${perl}/bin/perl";
-  args = ["-w" ./builder.pl];
-}
+runCommand name
+  { inherit manifest paths ignoreCollisions pathsToLink postBuild; }
+  ''
+    ${perl}/bin/perl -w ${./builder.pl}
+    eval "$postBuild"
+  ''

pkgs/top-level/all-packages.nix

@@ -233,9 +233,8 @@ let
     theAttrSet = arg;
   };
 
-  buildEnvScript = ../build-support/buildenv/builder.pl;
   buildEnv = import ../build-support/buildenv {
-    inherit stdenv perl;
+    inherit runCommand perl;
   };
 
   dotnetenv = import ../build-support/dotnetenv {