diff --git a/acs/builder.sh b/acs/builder.sh
index e2c75a3..4e1660b 100755
--- a/acs/builder.sh
+++ b/acs/builder.sh
@@ -32,6 +32,7 @@
 		SPD=spmd \
 		ENABLE_SPMD_LP=1\
 		ARM_BL2_SP_LIST_DTS=${WORKSPACE}/trusted-firmware-a/build/fvp/debug/sp_list_fragment.dts \
+		POETRY= \
 		all fip -j8
 }