diff --git a/Makefile b/Makefile
index bd511937482..3f80f48da3d 100644
--- a/Makefile
+++ b/Makefile
@@ -75,8 +75,8 @@ build: $(BUILD_DEPS)
 	rm -f lotus lotus-storage-miner
 	go build -o lotus ./cmd/lotus
 	go build -o lotus-storage-miner ./cmd/lotus-storage-miner
-	rice append --exec lotus -i ./build
-	rice append --exec lotus-storage-miner -i ./build
+	go run github.com/GeertJohan/go.rice/rice append --exec lotus -i ./build
+	go run github.com/GeertJohan/go.rice/rice append --exec lotus-storage-miner -i ./build
 .PHONY: build
 
 benchmarks:
diff --git a/build/paramfetch.go b/build/paramfetch.go
index d534623654c..8e4b2079fca 100644
--- a/build/paramfetch.go
+++ b/build/paramfetch.go
@@ -27,7 +27,9 @@ type paramFile struct {
 }
 
 func GetParams(storage bool) error {
-	os.Mkdir(paramdir, 0755)
+	if err := os.Mkdir(paramdir, 0755); err != nil {
+		return err
+	}
 
 	var params map[string]paramFile