diff --git a/pkgs/by-name/sh/sha1collisiondetection/package.nix b/pkgs/by-name/sh/sha1collisiondetection/package.nix
index 4f65e3034f16..eed1b14d274b 100644
--- a/pkgs/by-name/sh/sha1collisiondetection/package.nix
+++ b/pkgs/by-name/sh/sha1collisiondetection/package.nix
@@ -39,5 +39,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
     maintainers = with maintainers; [ leenaars ];
     license = licenses.mit;
+    mainProgram = "sha1dcsum";
   };
 }