diff --git a/default.nix b/default.nix
index 2d98ddd..8aa4e37 100644
--- a/default.nix
+++ b/default.nix
@@ -180,8 +180,8 @@ stdenv.mkDerivation {
     libxxf86vm
     libXv
     libXres
-    libxpm
-    libxmu
+    libXpm
+    libXmu
     libxkbfile
     libxinerama
     libxdamage