Fix flake

flake.nix

@@ -23,21 +23,24 @@
           src = self;
           nativeBuildInputs = nativeBuildInputs;
           buildPhase = ''
-            bazel build //src:hello-world;
+            bazel build //src:cosmos;
           '';
 
           installPhase = ''
             mkdir -p $out/bin;
-            cp -r bazel-bin/src/hello-world $out/bin;
+            cp -r bazel-bin/src/cosmos $out/bin;
           '';
         };
       in rec
       {
         defaultPackage = cosmos;
-        devShells.default = pkgs.mkShell {
-          nativeBuildInputs = nativeBuildInputs ++ [
-            cosmos
-          ];
+
+        devShells = {
+          default = pkgs.mkShell {
+            packages = nativeBuildInputs ++ [
+              cosmos
+            ];
+          };
         };
 
         # default = pkgs.devshell.mkShell {

src/BUILD

@@ -1,6 +1,6 @@
 load("@rules_cc//cc:defs.bzl", "cc_binary")
 
 cc_binary(
-    name = "hello-world",
-    srcs = ["hello_world.cpp"],
+    name = "cosmos",
+    srcs = ["main.cpp"],
 )

src/main.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main() {
+    std::cout << "[Cosmos CLI]: Hello from Developers Cosmos!" << std::endl;
+    return 0;
+}