* Remove trivial builders.

* Make builders unexecutable by removing the hash-bang line and
  execute permission.
* Convert calls to `derivation' to `mkDerivation'.
* Remove `system' and `stdenv' attributes from calls to
  `mkDerivation'.  These transformations were all done automatically,
  so it is quite possible I broke stuff.
* Put the `mkDerivation' function in stdenv/generic.

svn path=/nixpkgs/trunk/; revision=874

pkgs/applications/networking/browsers/firefox/default.nix

@@ -6,9 +6,8 @@ assert pkgconfig != null && gtk != null && perl != null
 
 assert libIDL.glib == gtk.glib;
 
-derivation {
+stdenv.mkDerivation {
   name = "firefox-0.8";
-  system = stdenv.system;
 
   builder = ./builder.sh;
   src = fetchurl {
@@ -16,7 +15,6 @@ derivation {
     md5 = "cdc85152f4219bf3e3f1a8dc46e04654";
   };
 
-  stdenv = stdenv;
   pkgconfig = pkgconfig;
   gtk = gtk;
   perl = perl;