diff --git a/pkgs/applications/science/astronomy/gravit/default.nix b/pkgs/applications/science/astronomy/gravit/default.nix
index 9910ec2c798..5a5a48b3550 100644
--- a/pkgs/applications/science/astronomy/gravit/default.nix
+++ b/pkgs/applications/science/astronomy/gravit/default.nix
@@ -37,6 +37,6 @@ stdenv.mkDerivation rec {
     '';
 
     platforms = stdenv.lib.platforms.mesaPlatforms;
-    hydraPlatforms = platforms.linux; # darwin times out
+    hydraPlatforms = stdenv.lib.platforms.linux; # darwin times out
   };
 }