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-rw-r--r--pkgs/development/interpreters/metamath/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/development/interpreters/metamath/default.nix b/pkgs/development/interpreters/metamath/default.nix
index c9a490ddc4e3..3d36b8501f10 100644
--- a/pkgs/development/interpreters/metamath/default.nix
+++ b/pkgs/development/interpreters/metamath/default.nix
@@ -15,6 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Interpreter for the metamath proof language";
+    mainProgram = "metamath";
     longDescription = ''
       The metamath program is an ASCII-based ANSI C program with a command-line
       interface. It was used (along with mmj2) to build and verify the proofs