diff --git a/default.nix b/default.nix
index a37ae8c..3c243d7 100644
--- a/default.nix
+++ b/default.nix
@@ -24,10 +24,7 @@ in
 }:
 let
   # fenix: rustup replacement for reproducible builds
-  toolchain = fenix.${system}.fromToolchainFile {
-    file = ./rust-toolchain.toml;
-    sha256 = "sha256-6eN/GKzjVSjEhGO9FhWObkRFaE1Jf+uqMSdQnb8lcB4=";
-  };
+  toolchain = fenix.${system}.stable.minimalToolchain;
   # crane: cargo and artifacts manager
   craneLib = crane.${system}.overrideToolchain toolchain;
   # cranix: extends crane building system with workspace bin building and Mold + Cranelift integrations
@@ -57,8 +54,11 @@ in
 {
   # `nix run`
   apps = rec {
-    simpleCommits = simpleCommitsPkg.app;
-    default = simpleCommits;
+    simpleCommits = simpleCommitsPkg.pkg;
+    default = {
+      program = "${simpleCommits}/bin/sc";
+      type = "app";
+      };
   };
   # `nix build`
   packages = rec {