$ git commit -am "refactored the flake"
-[master ba19983] refactored the flake
+[master 4c38386] refactored the flake
1 file changed, 21 insertions(+), 3 deletions(-)
$ nix run
evaluation warning: getExe: Package "cow-hello.sh" does not have the meta.mainProgram attribute. We'll assume that the main program has the same name for now, but this behavior is deprecated, because it leads to surprising errors when the assumption does not hold. If the package has a main program, please set `meta.mainProgram` in its definition to make this warning go away. Otherwise, if the package does not have a main program, or if you don't control its definition, use getExe' to specify the name to the program, such as lib.getExe' foo "bar".
@@ -7117,7 +7112,7 @@ Hello from your flake!