Merge pull request #5870 from dannon/yarn-network-timeout

Increase yarn's network timeout

Makefile

@@ -141,7 +141,7 @@ ifndef YARN
 	@echo "Could not find yarn, which is required to build the Galaxy client.\nTo install yarn, please visit \033[0;34mhttps://yarnpkg.com/en/docs/install\033[0m for instructions, and package information for all platforms.\n"
 	false;
 else
-	cd client && yarn install --check-files
+	cd client && yarn install --network-timeout 120000 --check-files
 endif