diff --git a/installer.nix b/installer.nix
index fe0e0bd..7ed2ac1 100644
--- a/installer.nix
+++ b/installer.nix
@@ -35,7 +35,7 @@ environment.etc."git-credentials".text =
     set -eux
 
     
-    export TMPDIR=/mnt/install-tmp
+    
 
     parted -s /dev/sda -- mklabel msdos
     parted -s /dev/sda -- mkpart primary 1MB -8GB
@@ -47,6 +47,7 @@ environment.etc."git-credentials".text =
     sleep 10
     mount /dev/disk/by-label/nixos /mnt
     mkdir -p /mnt/install-tmp
+    export TMPDIR=/mnt/install-tmp
     nixos-install --flake "$(cat /etc/flake-url)" --no-root-password --no-write-lock-file
     rm -rf /mnt/install-tmp
     sleep 10