diff --git a/pkgs/development/compilers/c3c/default.nix b/pkgs/development/compilers/c3c/default.nix
index 4310ad931792..d394ecbc4c21 100644
--- a/pkgs/development/compilers/c3c/default.nix
+++ b/pkgs/development/compilers/c3c/default.nix
@@ -56,5 +56,6 @@ llvmPackages.stdenv.mkDerivation rec {
     license = licenses.lgpl3Only;
     maintainers = with maintainers; [ luc65r ];
     platforms = platforms.all;
+    mainProgram = "c3c";
   };
 }