diff --git a/maintainers/scripts/eval-release.nix b/maintainers/scripts/eval-release.nix
index 3d4458699c7..57395f8cc68 100644
--- a/maintainers/scripts/eval-release.nix
+++ b/maintainers/scripts/eval-release.nix
@@ -16,7 +16,7 @@ let
 
   call = attrs: lib.flip lib.mapAttrs attrs
     (n: v: builtins.trace n (
-      if builtins.isFunction v then maybe (v { system = "i686-linux"; })
+      if builtins.isFunction v then maybe (v { system = "x86_64-linux"; })
       else if builtins.isAttrs v then call v
       else null
     ));
diff --git a/pkgs/development/compilers/gcc-4.4/default.nix b/pkgs/development/compilers/gcc-4.4/default.nix
index 11c89c7eb6b..d962d4ac347 100644
--- a/pkgs/development/compilers/gcc-4.4/default.nix
+++ b/pkgs/development/compilers/gcc-4.4/default.nix
@@ -132,7 +132,7 @@ stdenv.mkDerivation ({
     ++ (optional (zlib != null) zlib)
     ++ (optional (boehmgc != null) boehmgc)
     ++ (optionals langJava [zip unzip])
-    ++ (optionals javaAwtGtk [gtk pkgconfig libart_lgpl] ++ xlibs)
+    ++ (optionals javaAwtGtk ([gtk pkgconfig libart_lgpl] ++ xlibs))
     ++ (optionals (cross != null) [binutilsCross])
     ++ (optionals langAda [gnatboot])
     ++ (optionals langVhdl [gnat])
diff --git a/pkgs/development/compilers/gcc-4.5/default.nix b/pkgs/development/compilers/gcc-4.5/default.nix
index 8d3aa658ab3..61d0af6aa4f 100644
--- a/pkgs/development/compilers/gcc-4.5/default.nix
+++ b/pkgs/development/compilers/gcc-4.5/default.nix
@@ -204,7 +204,7 @@ stdenv.mkDerivation ({
     ++ (optional (zlib != null) zlib)
     ++ (optional (boehmgc != null) boehmgc)
     ++ (optionals langJava [zip unzip])
-    ++ (optionals javaAwtGtk [gtk pkgconfig libart_lgpl] ++ xlibs)
+    ++ (optionals javaAwtGtk ([gtk pkgconfig libart_lgpl] ++ xlibs))
     ++ (optionals (cross != null) [binutilsCross])
     ++ (optionals langAda [gnatboot])
     ++ (optionals langVhdl [gnat])