diff --git a/drivers/gpu/drm/amd/dkms/pre-build.sh b/drivers/gpu/drm/amd/dkms/pre-build.sh
index ec0c41cd4411e..febc7ddc30a24 100755
--- a/drivers/gpu/drm/amd/dkms/pre-build.sh
+++ b/drivers/gpu/drm/amd/dkms/pre-build.sh
@@ -1,5 +1,9 @@
 #!/bin/bash
 
+# unset TMPDIR in this shell
+# otherwise conflicting package libpam-tmpdir incorrectly generates config
+unset TMPDIR
+
 KCL="amd/amdkcl"
 INC="include"
 SRC="amd/dkms"