Fix Makefile and CI

clash/Makefile

@@ -1,6 +1,7 @@
 LISP=sbcl
 
-PREFIX=~/.local
+PREFIX=${HOME}/.local
+REAL_PREFIX=$(PREFIX)
 
 override SRCS=clash.asd format.lisp parse-date.lisp clash.lisp
 override LOAD_CLASH=--eval "(ql:quickload '(:cl-ppcre :clingon :local-time :uiop :trivial-features :osicat))" \
@@ -43,7 +44,7 @@ $(DEPLOY_OUTPUT): $(SRCS)
 deploy-install: deploy-build clash.1
 	mkdir -p "$(PREFIX)/lib/clash/"
 	cp $(DEPLOY_OUTPUT) "$(PREFIX)/lib/clash/"
-	ln -sf "/$(PREFIX)/lib/clash/clash" "$(PREFIX)/bin/clash"
+	ln -sf "$(REAL_PREFIX)/lib/clash/clash" "$(PREFIX)/bin/clash"
 	mkdir -p "$(PREFIX)/share/man/man1/"
 	cp clash.1 "$(PREFIX)/share/man/man1/"