diff --git a/oem/firstvoices/windows/src/inst/Makefile b/oem/firstvoices/windows/src/inst/Makefile
index 488b837d25..21529c1588 100644
--- a/oem/firstvoices/windows/src/inst/Makefile
+++ b/oem/firstvoices/windows/src/inst/Makefile
@@ -37,11 +37,11 @@ prereq:
     cd $(KEYMAN_ROOT)\..\keyboards
 
 !ifdef GIT_BASH_FOR_KEYMAN
-    $(GIT_BASH_FOR_KEYMAN) build.sh release/fv
-    $(GIT_BASH_FOR_KEYMAN) build.sh release/packages/fv_all
+    $(GIT_BASH_FOR_KEYMAN) build.sh -k release/fv
+    $(GIT_BASH_FOR_KEYMAN) build.sh -k release/packages/fv_all
 !else
-    start /wait ./build.sh release/fv
-    start /wait ./build.sh release/packages/fv_all
+    start /wait ./build.sh -k release/fv
+    start /wait ./build.sh -k release/packages/fv_all
 !endif
 
     copy release\packages\fv_all\build\fv_all.kmp $(FVROOT)\src\inst