fix_: makefile

Makefile

@@ -318,13 +318,13 @@ setup-dev: ##@setup Install all necessary tools for development
 setup-dev:
 	echo "Replaced by Nix shell. Use 'make shell' or just any target as-is."
 
-generate: SHELL := /bin/sh
 generate: PACKAGES ?= $$(go list -e ./... | grep -v "/contracts/")
 generate: GO_GENERATE_FAST ?= $(if $(shell which go-generate-fast),"true")
 generate: export GO_GENERATE_FAST_DEBUG ?= false
 generate: export GO_GENERATE_FAST_RECACHE ?= false
 generate:  ##@ Run generate for all given packages using go-generate-fast, fallback to `go generate` (e.g. for docker)
-	@if [ "$(GO_GENERATE_FAST)" = "true" ]; then \
+	@GOROOT=$$(go env GOROOT); \
+	if [ "$(GO_GENERATE_FAST)" = "true" ]; then \
 		go-generate-fast -x $(PACKAGES); \
 	else \
 		go generate -x $(PACKAGES); \