build/make/Makefile.in (SCRIPT_PACKAGE_templ): Remove script dir before running spkg-install

Author: Matthias Koeppe

build/make/Makefile.in

@@ -724,6 +724,7 @@ $(1)-$(4)-no-deps:
 	    echo "$$($(4)_DISABLED_MESSAGE)" 2>&1; \
 	    exit 1; \
 	elif [ -x '$$(SAGE_ROOT)/build/pkgs/$(1)/spkg-install' ]; then \
+	    rm -rf '$$($(4))/var/lib/sage/scripts/$(1)'; \
 	    cd '$$(SAGE_ROOT)/build/pkgs/$(1)' && \
 		. '$$(SAGE_ROOT)/src/bin/sage-src-env-config' && \
 		. '$$(SAGE_ROOT)/src/bin/sage-env-config' && \