try to fix Makefile

.copr/Makefile

@@ -1,15 +1,19 @@
+src := $(shell pwd)/.copr
 tag=
 
-srpm:
-	dnf -y install git rpmdevtools golang rpmautospec rpkg
+srpm: dep
+	pushd $(src)
 	$(eval tag=$(shell git tag -l 'v*' --sort=-v:refname | head -n 1))
 	@echo $(tag)
 	spectool -g artalk.spec
-	./vendor-tarball.sh ${tag}
+	./vendor-tarball.sh $(tag)
 	git stash					# make sure workspace is empty.
 	cp changelog artalk.spec ../
 	git add ../changelog ../artalk.spec && git commit -m "for rpmautospec [skip changelog]"
 	rpmautospec process-distgit ../artalk.spec artalk.spec
 	git stash pop				# pop it!
-	mkdir -p $(outdir)
 	rpkg srpm --spec artalk.spec --outdir=$(outdir)
+	popd
+
+dep:
+	dnf -y install git rpmdevtools golang rpmautospec rpkg