diff --git a/builtin/builtin.go b/builtin/builtin.go
index 6220bd4..dc05570 100644
--- a/builtin/builtin.go
+++ b/builtin/builtin.go
@@ -78,11 +78,5 @@ func Must[T any](value T, err error) T {
 // returns first error, or nil if no errors
 // Deprecated: use `FirstNonEmpty()`
 func FirstError(errs ...error) error {
-	for _, err := range errs {
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
+	return FirstNonEmpty(errs...)
 }
diff --git a/go.mod b/go.mod
index 40a2577..e9e9bca 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/function61/gokit
 
-go 1.18
+go 1.20
 
 require (
 	github.com/apex/gateway v1.1.1
diff --git a/turbobob.json b/turbobob.json
index 686cf9f..266b079 100644
--- a/turbobob.json
+++ b/turbobob.json
@@ -6,7 +6,7 @@
 	"builders": [
 		{
 			"name": "default",
-			"uses": "docker://fn61/buildkit-golang:20221017_1220_d2ee72b9",
+			"uses": "docker://fn61/buildkit-golang:20230329_0959_f235a7bc",
 			"mount_destination": "/workspace",
 			"workdir": "/workspace",
 			"commands": {