* 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/development/tools/misc/gnum4/builder.sh

@@ -1,5 +1,3 @@
-#! /bin/sh
-
 . $stdenv/setup || exit 1
 
 tar xvfz $src || exit 1

pkgs/development/tools/misc/gnum4/default.nix

@@ -1,11 +1,9 @@
 {stdenv, fetchurl}:
-derivation {
+stdenv.mkDerivation {
   name = "gnum4-1.4";
-  system = stdenv.system;
   builder = ./builder.sh;
   src = fetchurl {
     url = ftp://ftp.nluug.nl/pub/gnu/m4/m4-1.4.tar.gz;
     md5 = "9eb2dd07740b2d2f3c7adb3e8d299bda";
   };
-  stdenv = stdenv;
 }