diff --git a/encoding/bytesutil/BUILD.bazel b/encoding/bytesutil/BUILD.bazel
index 86be6c842..52f5e9992 100644
--- a/encoding/bytesutil/BUILD.bazel
+++ b/encoding/bytesutil/BUILD.bazel
@@ -5,7 +5,6 @@ go_library(
     srcs = [
         "bits.go",
         "bytes.go",
-        "bytes_go120.go",
         "bytes_legacy.go",
         "eth_types.go",
         "hex.go",
diff --git a/encoding/bytesutil/bytes_go120.go b/encoding/bytesutil/bytes_go120.go
index e35dfa179..5666fdfb4 100644
--- a/encoding/bytesutil/bytes_go120.go
+++ b/encoding/bytesutil/bytes_go120.go
@@ -1,5 +1,5 @@
-//go:build go1.20
-// +build go1.20
+//go:build prysmAt1.20
+// +build prysmAt1.20
 
 package bytesutil
 
diff --git a/encoding/bytesutil/bytes_legacy.go b/encoding/bytesutil/bytes_legacy.go
index 7ede8a934..452512197 100644
--- a/encoding/bytesutil/bytes_legacy.go
+++ b/encoding/bytesutil/bytes_legacy.go
@@ -1,5 +1,5 @@
-//go:build !go1.20
-// +build !go1.20
+//go:build !prysmAt1.20
+// +build !prysmAt1.20
 
 package bytesutil