diff --git a/shell.nix b/shell.nix
index f3b811d..a2f91ea 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,4 +5,9 @@ mkShell {
     jq
     skopeo
   ];
+
+  shellHook = ''
+    # try to work aroud build issues
+    unset TMPDIR
+  '';
 }