diff --git a/flake.nix b/flake.nix
index bb46a7e..7a51b3e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -87,7 +87,6 @@
                 cat > "$out" <<'SH'
                 #!/bin/sh
                 set -euf
-                BUNDLE_PWD="''${BUNDLE_PWD:-$PWD}"
                 : "''${TMPDIR:=/tmp}"
                 EXTRACT_DIR="$(mktemp -d "''${TMPDIR%/}/nxbdl.XXXXXX")"
                 cleanup() { [ -n "''${KEEP_BUNDLE:-}" ] || rm -rf "$EXTRACT_DIR"; }
@@ -96,6 +95,8 @@
                 ARCHIVE_LINE=$(awk '/^__ARCHIVE_BELOW__/ {print NR+1; exit 0}' "$0")
                 tail -n +"$ARCHIVE_LINE" "$0" | tar -xzf - -C "$EXTRACT_DIR"
 
+                BUNDLE_PWD="''${BUNDLE_PWD:-$PWD}"
+
                 cd "$EXTRACT_DIR"
                 APP_REL='__APP_REL__'
                 PROOT_REL='__PROOT_REL__'