2 files changed, 15 insertions, 1 deletions
diff --git a/pkgs/applications/audio/schismtracker/default.nix b/pkgs/applications/audio/schismtracker/default.nix
index 2b2fd161ede..22786304faa 100644
--- a/pkgs/applications/audio/schismtracker/default.nix
+++ b/pkgs/applications/audio/schismtracker/default.nix
@@ -9,10 +9,17 @@ stdenv.mkDerivation rec {
     sha256 = "1ny7wv2wxm1av299wvpskall6438wjjpadphmqc7c0h6d0zg5kii";
   };
 
+  preConfigure = ''
+    # Build fails on Linux with windres.
+    export ac_cv_prog_ac_ct_WINDRES=
+  '';
+
   configureFlags = "--enable-dependency-tracking";
 
   buildInputs = [ alsaLib python SDL ];
 
+  enableParallelBuilding = true;
+
   meta = {
     description = "Music tracker application, free reimplementation of Impulse Tracker";
     homepage = http://schismtracker.org/;
diff --git a/pkgs/applications/science/astronomy/gravit/default.nix b/pkgs/applications/science/astronomy/gravit/default.nix
index 5903edd337d..190186db181 100644
--- a/pkgs/applications/science/astronomy/gravit/default.nix
+++ b/pkgs/applications/science/astronomy/gravit/default.nix
@@ -12,7 +12,14 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoconf automake ];
 
-  preConfigure = "./autogen.sh";
+  preConfigure = ''
+    ./autogen.sh
+
+    # Build fails on Linux with windres.
+    export ac_cv_prog_WINDRES=
+  '';
+
+  enableParallelBuilding = true;
 
   meta = {
     homepage = http://gravit.slowchop.com;