refactor: modify derivation build process

assignment1/default.nix

@@ -1,22 +1,22 @@
 let
-  basic-c = name: { stdenv }:
+  basicC = name: { stdenv }:
     stdenv.mkDerivation {
       inherit name;
       src = ./.;
       buildPhase = ''
         runHook preBuild
-        gcc part2/${name}.c -o ${name}
+        gcc part2/${name}.c -o ${name}.bin
         runHook postBuild
       '';
       installPhase = ''
         runHook preInstall
         mkdir -p $out/bin
-        install ${name} $out/bin/
+        install ${name}.bin $out/bin/${name}
         runHook postInstall
       '';
     };
 in {
-  a1-hello = basic-c "hello";
-  a1-employee = basic-c "employee";
-  a1-logwriter = basic-c "logwriter";
+  a1-hello = basicC "hello";
+  a1-employee = basicC "employee";
+  a1-logwriter = basicC "logwriter";
 }