1 files changed, 2 insertions, 0 deletions

diff --git a/libs.nix b/libs.nix
index da13a03..cef8586 100644
--- a/libs.nix
+++ b/libs.nix
@@ -26,4 +26,6 @@ in
       name = "${json.meta.name}-${version}";
       src = fetchgit json.git;
     };
+
+  checkEnv = var: builtins.stringLength (builtins.getEnv var) > 0;
 }