diff --git a/repos/nix b/repos/nix
index fcf1857e2..42b5c693e 160000
--- a/repos/nix
+++ b/repos/nix
@@ -1 +1 @@
-Subproject commit fcf1857e254ab654e0fb73fe9706e33c52e79a5c
+Subproject commit 42b5c693e7cd8f2309661438e956d947de30080e