diff --git a/flake.nix b/flake.nix
index 6d794a0..916d1b5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -161,17 +161,23 @@
               text = ''
                 accept-flake-config = true
                 experimental-features = nix-command flakes
+                substituters = https://nix.h.lyte.dev https://cache.nixos.org/
+                trusted-substituters = https://nix.h.lyte.dev https://cache.nixos.org/
+                trusted-public-keys = h.lyte.dev:HeVWtne31ZG8iMf+c15VY3/Mky/4ufXlfTpT8+4Xbs0= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
               '';
             })
           ];
 
           extraCommands = ''
             # enable /usr/bin/env for scripts
-            # mkdir -p usr
-            # ln -s ../bin usr/bin
+            mkdir -p usr
+            ln -s ../bin usr/bin
+
+            # create /tmp
+            mkdir -p tmp
 
             # create HOME
-            # mkdir -vp root
+            mkdir -vp root
           '';
           config = {
             Cmd = ["/bin/bash"];