* 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/tools/archivers/unzip/default.nix

@@ -1,12 +1,10 @@
 {stdenv, fetchurl}:
 
-derivation {
+stdenv.mkDerivation {
   name = "unzip-5.50";
-  system = stdenv.system;
   builder = ./builder.sh;
   src = fetchurl {
     url = ftp://ftp.info-zip.org/pub/infozip/src/unzip550.tar.gz;
     md5 = "798592d62e37f92571184236947122ed";
   };
-  inherit stdenv;
 }