diff --git a/.envrc b/.envrc
index 3b652496e..ccbf07548 100644
--- a/.envrc
+++ b/.envrc
@@ -25,3 +25,6 @@ watch_file snix/shell.nix
 # Activate snix development shell
 # FUTUREWORK: merge together (#65)
 use nix -A snix.shell
+
+# https://github.com/direnv/direnv/pull/1409
+unset TMP TMPDIR TEMP TEMPDIR