ci: go tool go-generate-fast

Makefile

@@ -241,7 +241,7 @@ setup-dev:
 	echo "Replaced by Nix shell. Use 'make shell' or just any target as-is."
 
 generate: PACKAGES ?= $$(go list -e ./... | grep -v "/contracts/")
-generate: GO_GENERATE_CMD ?= $$(which go-generate-fast || echo 'go generate')
+generate: GO_GENERATE_CMD ?= go tool go-generate-fast
 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)

nix/overlay.nix

@@ -57,5 +57,4 @@ in rec {
 
   # Custom packages
   codecov-cli = callPackage ./pkgs/codecov-cli { };
-  go-generate-fast = callPackage ./pkgs/go-generate-fast { };
 }

nix/shell.nix

@@ -22,7 +22,7 @@ in mkShell {
 
   buildInputs = with pkgs; [
     git jq which
-    go golangci-lint go-junit-report gopls codecov-cli go-generate-fast
+    go golangci-lint go-junit-report gopls codecov-cli
     protobuf3_24 protoc-gen-go gotestsum openjdk openssl
    ] ++ lib.optionals (stdenv.isDarwin) [ xcodeWrapper ];