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-rw-r--r--pkgs/applications/science/logic/lean2/default.nix2
1 files changed, 2 insertions, 0 deletions
diff --git a/pkgs/applications/science/logic/lean2/default.nix b/pkgs/applications/science/logic/lean2/default.nix
index f45f65e90826..2b861b6d06d9 100644
--- a/pkgs/applications/science/logic/lean2/default.nix
+++ b/pkgs/applications/science/logic/lean2/default.nix
@@ -20,6 +20,8 @@ stdenv.mkDerivation rec {
     cd src
   '';
 
+  cmakeFlags = [ "-GNinja" ];
+
   postInstall = ''
     wrapProgram $out/bin/linja --prefix PATH : $out/bin:${ninja}/bin
   '';