diff --git a/scripts/Arch/OS/setup.sh b/scripts/Arch/OS/setup.sh
index e7707a9b..e3637049 100755
--- a/scripts/Arch/OS/setup.sh
+++ b/scripts/Arch/OS/setup.sh
@@ -1,4 +1,5 @@
 #!/bin/bash -e
+PARTITION_MODULE="${PARTITION_MODULE:+"$(realpath "$PARTITION_MODULE")"}";
 pushd "${BASH_SOURCE%/*}" > /dev/null;
 
 PARTITION_MODULE="${PARTITION_MODULE:-"./partition.nix"}";