diff --git a/openlane/prga/config.tcl b/openlane/prga/config.tcl
index e2635b0..bb0df5a 100644
--- a/openlane/prga/config.tcl
+++ b/openlane/prga/config.tcl
@@ -81,5 +81,12 @@
 set ::env(GLB_RT_MAX_DIODE_INS_ITERS)       10
 set ::env(GLB_RT_ANT_ITERS)                 10
 
+set ::env(DECAP_CELL) "\
+    sky130_fd_sc_hd__decap_3 \
+    sky130_fd_sc_hd__decap_4 \
+    sky130_fd_sc_hd__decap_6 \
+    sky130_fd_sc_hd__decap_8 \
+    sky130_ef_sc_hd__decap_12"
+
 # If you're going to use multiple power domains, then disable cvc run.
 set ::env(RUN_CVC) 1
diff --git a/openlane/prga/hackflow.sh b/openlane/prga/hackflow.sh
index 0b76b49..d6393dd 100644
--- a/openlane/prga/hackflow.sh
+++ b/openlane/prga/hackflow.sh
@@ -16,6 +16,7 @@
 pushd ${TAPEOUT_ROOT}/caravel
 
 # 2. hack caravel/openlane/Makefile
+git checkout caravel/openlane/Makefile
 sed -i "/^OPENLANE_BASIC_COMMAND/c\OPENLANE_BASIC_COMMAND = \"cd \$(PWD)/../openlane && flow.tcl -design ./\$* -save_path .. -save -tag \$* -overwrite -to cts\"" \
     caravel/openlane/Makefile