diff --git a/pkgs/development/compilers/ldc/generic.nix b/pkgs/development/compilers/ldc/generic.nix
index 94a4ac8380a7..07b6986189c0 100644
--- a/pkgs/development/compilers/ldc/generic.nix
+++ b/pkgs/development/compilers/ldc/generic.nix
@@ -130,6 +130,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/ldc-developers/ldc";
     # from https://github.com/ldc-developers/ldc/blob/master/LICENSE
     license = with licenses; [ bsd3 boost mit ncsa gpl2Plus ];
+    mainProgram = "ldc2";
     maintainers = with maintainers; [ lionello jtbx ];
     platforms = [ "x86_64-linux" "i686-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
   };