diff --git a/pkgs/tools/security/rblake2sum/default.nix b/pkgs/tools/security/rblake2sum/default.nix
index a5a4a1bce76c..8f2a86836356 100644
--- a/pkgs/tools/security/rblake2sum/default.nix
+++ b/pkgs/tools/security/rblake2sum/default.nix
@@ -24,5 +24,6 @@ rustPlatform.buildRustPackage {
     homepage = "https://github.com/crev-dev/rblake2sum";
     license = [ licenses.mit ];
     maintainers = with maintainers; [ dpc ];
+    mainProgram = "rblake2sum";
   };
 }