misc pkgs: Basic sed to get fix pkgconfig and autoreconfHook buildInputs

Only acts on one-line dependency lists.

pkgs/development/libraries/fontconfig/default.nix

@@ -45,7 +45,8 @@ stdenv.mkDerivation rec {
   outputs = [ "bin" "dev" "lib" "out" ]; # $out contains all the config
 
   propagatedBuildInputs = [ freetype ];
-  buildInputs = [ pkgconfig expat ];
+  nativeBuildInputs = [ pkgconfig ];
+  buildInputs = [ expat ];
 
   configureFlags = [
     "--with-cache-dir=/var/cache/fontconfig" # otherwise the fallback is in $out/