diff --git a/pkgs/development/libraries/fontconfig/make-fonts-conf.nix b/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
index 3cd4a894b37..b18d72e0a22 100644
--- a/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
+++ b/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
@@ -2,7 +2,8 @@
 
 runCommand "fonts.conf"
   {
-    buildInputs = [ libxslt fontconfig ];
+    nativeBuildInputs = [ libxslt ];
+    buildInputs = [ fontconfig ];
     # Add a default font for non-nixos systems, <1MB and in nixos defaults.
     fontDirectories = fontDirectories ++ [ dejavu_fonts.minimal ];
   }
diff --git a/pkgs/development/libraries/librsvg/default.nix b/pkgs/development/libraries/librsvg/default.nix
index 9cd68cacfe7..c575cee752f 100644
--- a/pkgs/development/libraries/librsvg/default.nix
+++ b/pkgs/development/libraries/librsvg/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, pkgconfig, glib, gdk_pixbuf, pango, cairo, libxml2, libgsf
-, bzip2, libcroco, libintl, darwin, rust, gnome3
+, bzip2, libcroco, libintl, darwin, rustc, cargo, gnome3
 , withGTK ? false, gtk3 ? null
 , vala, gobject-introspection }:
 
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ glib gdk_pixbuf cairo ] ++ lib.optional withGTK gtk3;
 
-  nativeBuildInputs = [ pkgconfig rust.rustc rust.cargo vala gobject-introspection ]
+  nativeBuildInputs = [ pkgconfig rustc cargo vala gobject-introspection ]
     ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
       ApplicationServices
     ]);