diff --git a/shell.nix b/shell.nix
index 5c0a41de..1d09aaa2 100644
--- a/shell.nix
+++ b/shell.nix
@@ -3,6 +3,11 @@
 pkgs.mkShell {
   # Enable experimental features without having to specify the argument
   NIX_CONFIG = "experimental-features = nix-command flakes";
+  shellHook = ''
+    export TMP=$(mktemp -d "/tmp/nix-shell-XXXXXX")
+    export TEMP=$TMP
+    export TMPDIR=$TMP
+  '';
 
   nativeBuildInputs = with pkgs; [
     fluxcd