diff --git a/toolchain/local/triplet/os.bzl b/toolchain/local/triplet/os.bzl
index b0872a63f37924b48c61cc0880a3ceb3ac55b9c4..a7de60651c590298dc7089ecd47a48afde8c74de 100644
--- a/toolchain/local/triplet/os.bzl
+++ b/toolchain/local/triplet/os.bzl
@@ -114,7 +114,7 @@ def _uname(rctx, path):
     if result.return_code != 0:
         fail("Failed to get `uname` release: {}".format(result.stderr))
 
-    version = result.stdout.split("-", 1)[0]
+    version = result.stdout.strip().split("-", 1)[0]
 
     major, minor, patch = split(version, ".", {
         3: lambda x, y, z: (x, y, z),