diff --git a/pkgs/tools/graphics/netpbm/default.nix b/pkgs/tools/graphics/netpbm/default.nix
index df65325b98d..dc45ad7a841 100644
--- a/pkgs/tools/graphics/netpbm/default.nix
+++ b/pkgs/tools/graphics/netpbm/default.nix
@@ -58,5 +58,6 @@ stdenv.mkDerivation {
     homepage = http://netpbm.sourceforge.net/;
     description = "Toolkit for manipulation of graphic images";
     license = "GPL,free";
+    platforms = stdenv.lib.platforms.linux;
   };
 }