Method IsNixpkgs

nix/flake/flakeref.go:473–482

IsNixpkgs reports whether the flake reference looks like a nixpkgs flake. While there are many ways to specify this input, devbox always uses github:NixOS/nixpkgs/ as the URL. If the user wishes to reference nixpkgs themselves, this function may not return true.

()

// github:NixOS/nixpkgs/<hash> as the URL. If the user wishes to reference nixpkgs
// themselves, this function may not return true.
func (r Ref) IsNixpkgs() bool {
	switch r.Type {
	case TypeGitHub:
		return r.Owner == "NixOS" && r.Repo == "nixpkgs"
	case TypeIndirect:
		return r.ID == "nixpkgs"
	default:
		return false
	}
}

func isGitHash(s string) bool {
	if len(s) != 40 {