Corrected the Makefiles for sky130 and gf180mcu so that the
"--with-reference" configure option works.  (See github issue #372
from Kareem Farid.)
diff --git a/VERSION b/VERSION
index 2b9c98c..a72006d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.412
+1.0.413
diff --git a/gf180mcu/Makefile.in b/gf180mcu/Makefile.in
index b2b846a..768cb12 100644
--- a/gf180mcu/Makefile.in
+++ b/gf180mcu/Makefile.in
@@ -494,7 +494,7 @@
 
 pr-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		FD_PR_COMMIT = `cat ${REFERENCE_JSON} | grep gf180mcu_fd_pr | grep -v COMMIT | cut -d'"' -f4` ; \
+		FD_PR_COMMIT=`cat ${REFERENCE_JSON} | grep gf180mcu_fd_pr | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${GF180MCU_PR_PATH}" != "x" ; then \
 		if test -d "${GF180MCU_PR_PATH}" ; then \
@@ -507,7 +507,7 @@
 
 pv-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		FD_PV_COMMIT = `cat ${REFERENCE_JSON} | grep gf180mcu_fd_pv | grep -v COMMIT | cut -d'"' -f4` ; \
+		FD_PV_COMMIT=`cat ${REFERENCE_JSON} | grep gf180mcu_fd_pv | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${GF180MCU_PV_PATH}" != "x" ; then \
 		if test -d "${GF180MCU_PV_PATH}" ; then \
@@ -520,7 +520,7 @@
 
 io-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		FD_IO_COMMIT = `cat ${REFERENCE_JSON} | grep gf180mcu_fd_io | grep -v COMMIT | cut -d'"' -f4` ; \
+		FD_IO_COMMIT=`cat ${REFERENCE_JSON} | grep gf180mcu_fd_io | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${GF180MCU_IO_PATH}" != "x" ; then \
 		if test -d "${GF180MCU_IO_PATH}" ; then \
@@ -533,7 +533,7 @@
 
 sc-7t-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		FD_SC_MCU7T5V0_COMMIT = `cat ${REFERENCE_JSON} | grep gf180mcu_fd_sc_mcu7t5v0 | grep -v COMMIT | cut -d'"' -f4` ; \
+		FD_SC_MCU7T5V0_COMMIT=`cat ${REFERENCE_JSON} | grep gf180mcu_fd_sc_mcu7t5v0 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${GF180MCU_SC_7T5V0_PATH}" != "x" ; then \
 		if test -d "${GF180MCU_SC_7T5V0_PATH}" ; then \
@@ -546,7 +546,7 @@
 
 sc-9t-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		FD_SC_MCU9T5V0_COMMIT = `cat ${REFERENCE_JSON} | grep gf180mcu_fd_sc_mcu9t5v0 | grep -v COMMIT | cut -d'"' -f4` ; \
+		FD_SC_MCU9T5V0_COMMIT=`cat ${REFERENCE_JSON} | grep gf180mcu_fd_sc_mcu9t5v0 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${GF180MCU_SC_9T5V0_PATH}" != "x" ; then \
 		if test -d "${GF180MCU_SC_9T5V0_PATH}" ; then \
@@ -559,7 +559,7 @@
 
 sram-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		FD_IP_SRAM_COMMIT = `cat ${REFERENCE_JSON} | grep gf180mcu_fd_ip_sram | grep -v COMMIT | cut -d'"' -f4` ; \
+		FD_IP_SRAM_COMMIT=`cat ${REFERENCE_JSON} | grep gf180mcu_fd_ip_sram | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${GF180MCU_SRAM_PATH}" != "x" ; then \
 		if test -d "${GF180MCU_SRAM_PATH}" ; then \
@@ -572,7 +572,7 @@
 
 osu-sc-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		OSU_SC_COMMIT = `cat ${REFERENCE_JSON} | grep gf180mcu_osu_sc_gf12t3v3 | grep -v COMMIT | cut -d'"' -f4` ; \
+		OSU_SC_COMMIT=`cat ${REFERENCE_JSON} | grep gf180mcu_osu_sc_gf12t3v3 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${GF180MCU_OSU_SC_PATH}" != "x" ; then \
 		if test -d "${GF180MCU_OSU_SC_PATH}" ; then \
diff --git a/sky130/Makefile.in b/sky130/Makefile.in
index f3d269c..90d6830 100644
--- a/sky130/Makefile.in
+++ b/sky130/Makefile.in
@@ -629,7 +629,7 @@
 
 pdk-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		SKYWATER_COMMIT = `cat ${REFERENCE_JSON} | grep skywater_pdk | grep -v COMMIT | cut -d'"' -f4` ; \
+		SKYWATER_COMMIT=`cat ${REFERENCE_JSON} | grep skywater_pdk | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${SKYWATER_PATH}" != "x" ; then \
 		if test -d "${SKYWATER_PATH}" ; then \
@@ -642,7 +642,7 @@
 
 alpha-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		ALPHA_COMMIT = `cat ${REFERENCE_JSON} | grep sky130_ml_xx_hd | grep -v COMMIT | cut -d'"' -f4` ; \
+		ALPHA_COMMIT=`cat ${REFERENCE_JSON} | grep sky130_ml_xx_hd | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${ALPHA_PATH}" != "x" ; then \
 		if test -d "${ALPHA_PATH}" ; then \
@@ -655,7 +655,7 @@
 
 sram-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		SRAM_COMMIT = `cat ${REFERENCE_JSON} | grep sky130_sram_macros | grep -v COMMIT | cut -d'"' -f4` ; \
+		SRAM_COMMIT=`cat ${REFERENCE_JSON} | grep sky130_sram_macros | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${SRAM_PATH}" != "x" ; then \
 		if test -d "${SRAM_PATH}" ; then \
@@ -668,7 +668,7 @@
 
 sram-space-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		SRAM_SPACE_COMMIT = `cat ${REFERENCE_JSON} | grep sky130_fd_bd_sram | grep -v COMMIT | cut -d'"' -f4` ; \
+		SRAM_SPACE_COMMIT=`cat ${REFERENCE_JSON} | grep sky130_fd_bd_sram | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${SRAM_SPACE_PATH}" != "x" ; then \
 		if test -d "${SRAM_SPACE_PATH}" ; then \
@@ -681,7 +681,7 @@
 
 xschem-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		XSCHEM_COMMIT = `cat ${REFERENCE_JSON} | grep xschem_sky130 | grep -v COMMIT | cut -d'"' -f4` ; \
+		XSCHEM_COMMIT=`cat ${REFERENCE_JSON} | grep xschem_sky130 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${XSCHEM_PATH}" != "x" ; then \
 		if test -d "${XSCHEM_PATH}" ; then \
@@ -694,7 +694,7 @@
 
 klayout-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		KLAYOUT_COMMIT = `cat ${REFERENCE_JSON} | grep klayout_sky130 | grep -v COMMIT | cut -d'"' -f4` ; \
+		KLAYOUT_COMMIT=`cat ${REFERENCE_JSON} | grep klayout_sky130 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${KLAYOUT_PATH}" != "x" ; then \
 		if test -d "${KLAYOUT_PATH}" ; then \
@@ -707,7 +707,7 @@
 
 precheck-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		PRECHECK_COMMIT = `cat ${REFERENCE_JSON} | grep precheck_sky130 | grep -v COMMIT | cut -d'"' -f4` ; \
+		PRECHECK_COMMIT=`cat ${REFERENCE_JSON} | grep precheck_sky130 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${PRECHECK_PATH}" != "x" ; then \
 		if test -d "${PRECHECK_PATH}" ; then \
@@ -720,7 +720,7 @@
 
 osu-t12-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		OSU_T12_COMMIT = `cat ${REFERENCE_JSON} | grep sky130_osu_sc_t12 | grep -v COMMIT | cut -d'"' -f4` ; \
+		OSU_T12_COMMIT=`cat ${REFERENCE_JSON} | grep sky130_osu_sc_t12 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${OSU_T12_PATH}" != "x" ; then \
 		if test -d "${OSU_T12_PATH}" ; then \
@@ -733,7 +733,7 @@
 
 osu-t15-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		OSU_T15_COMMIT = `cat ${REFERENCE_JSON} | grep sky130_osu_sc_t15 | grep -v COMMIT | cut -d'"' -f4` ; \
+		OSU_T15_COMMIT=`cat ${REFERENCE_JSON} | grep sky130_osu_sc_t15 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${OSU_T15_PATH}" != "x" ; then \
 		if test -d "${OSU_T15_PATH}" ; then \
@@ -746,7 +746,7 @@
 
 osu-t18-repo:
 	if test "x${REFERENCE_JSON}" != "x"; then \
-		OSU_T18_COMMIT = `cat ${REFERENCE_JSON} | grep sky130_osu_sc_t18 | grep -v COMMIT | cut -d'"' -f4` ; \
+		OSU_T18_COMMIT=`cat ${REFERENCE_JSON} | grep sky130_osu_sc_t18 | grep -v COMMIT | cut -d'"' -f4` ; \
 	fi
 	if test "x${OSU_T18_PATH}" != "x" ; then \
 		if test -d "${OSU_T18_PATH}" ; then \