diff --git a/Makefile b/Makefile
index 8a04a599..6e5a7b13 100644
--- a/Makefile
+++ b/Makefile
@@ -183,8 +183,9 @@ macros:
 
 mount:
 	@docker run -it -v $(TOP_DIR):/openram \
-		-v $(SKY130_PDK):$(SKY130_PDK) \
-		-e PDK_ROOT=$(PDK_ROOT) \
+		-v $(PDK_ROOT):/pdk \
+		-e PDK_ROOT=/pdk \
+		-e PDKPATH=/pdk/sky130A \
         -e OPENRAM_HOME=/openram/compiler \
         -e OPENRAM_TECH=/openram/technology \
 		-v /etc/passwd:/etc/passwd:ro -v /etc/group:/etc/group:ro \
diff --git a/openram.mk b/openram.mk
index d03055b1..a8776b2e 100644
--- a/openram.mk
+++ b/openram.mk
@@ -2,7 +2,7 @@ OPENRAM_HOME := $(abspath $(TOP_DIR)/compiler)
 OPENRAM_TECH := $(abspath $(TOP_DIR)/technology)
 OPENRAM_COMPILER := $(OPENRAM_HOME)/openram.py
 
-PDK_ROOT = $(TOP_DIR)
+PDK_ROOT ?= $(TOP_DIR)
 
 ifeq (,$(wildcard $(OPENRAM_COMPILER)))
 $(error Did not find '$(OPENRAM_COMPILER)' in '$(OPENRAM_HOME)' (from $$OPENRAM_HOME))