The react build is provided via extra distfile

Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -83,7 +83,7 @@ ui-lint:
 	cd $(UI_PATH) && npm run lint
 
 .PHONY: assets
-assets: ui-install ui-build
+assets:
 
 .PHONY: assets-compress
 assets-compress: assets
@@ -124,7 +124,7 @@ plugins/plugins.go: plugins.yml plugins/generate.go
 plugins: plugins/plugins.go
 
 .PHONY: build
-build: assets npm_licenses assets-compress common-build plugins
+build: assets-compress common-build plugins
 
 .PHONY: bench_tsdb
 bench_tsdb: $(PROMU)