Fix Makefile and PKGBUILD for proper installation

Makefile

@@ -12,11 +12,11 @@ clean:
 	-rm -f fetchy
 
 install: all
-	mkdir -p $(PREFIX)/bin
-	cp -f fetchy $(PREFIX)/bin
-	chmod 755 $(PREFIX)/bin/fetchy
+	mkdir -p $(DESTDIR)$(PREFIX)/bin
+	cp -f fetchy $(DESTDIR)$(PREFIX)/bin
+	chmod 755 $(DESTDIR)$(PREFIX)/bin/fetchy
 
 uninstall:
-	-rm -f $(PREFIX)/bin/fetchy
+	-rm -f $(DESTDIR)$(PREFIX)/bin/fetchy
 
 .PHONY: all install uninstall clean

PKGBUILD

@@ -27,15 +27,9 @@ validpgpkeys=()
 build() {
   cd fetchy
   make
-
 }
 
 package() {
   cd fetchy
-  mkdir -p ${pkgdir}/opt/${pkgname}
-  cp -rf * ${pkgdir}/opt/${pkgname}
-  make install
-  
+  make DESTDIR="$pkgdir" PREFIX="/usr" install
 }
-
-