added PDK_VARIENT variable
diff --git a/Makefile b/Makefile
index e787f93..7072c14 100644
--- a/Makefile
+++ b/Makefile
@@ -28,6 +28,9 @@
# Install lite version of caravel, (1): caravel-lite, (0): caravel
CARAVEL_LITE?=1
+# PDK switch varient
+export PDK_VARIENT?=sky130B
+
MPW_TAG ?= mpw-5c
ifeq ($(CARAVEL_LITE),1)
@@ -83,6 +86,7 @@
-e CARAVEL_ROOT=${CARAVEL_ROOT} \
-e TOOLS=/opt/riscv32i \
-e DESIGNS=$(TARGET_PATH) \
+ -e PDK_VARIENT=$(PDK_VARIENT) \
-e CORE_VERILOG_PATH=$(TARGET_PATH)/mgmt_core_wrapper/verilog \
-e GCC_PREFIX=riscv32-unknown-elf \
-e MCW_ROOT=$(MCW_ROOT) \
