diff --git a/pkgs/tools/graphics/gmic-qt/default.nix b/pkgs/tools/graphics/gmic-qt/default.nix
index d81fe16a9109..fa974aa97c82 100644
--- a/pkgs/tools/graphics/gmic-qt/default.nix
+++ b/pkgs/tools/graphics/gmic-qt/default.nix
@@ -108,5 +108,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     maintainers = [ maintainers.lilyinstarlight ];
     platforms = platforms.unix;
+    mainProgram = "gmic_qt";
   };
 }