Merge "Use posixpath to build device path."
diff --git a/checkbuild.py b/checkbuild.py
index 5b35392..46042d6 100644
--- a/checkbuild.py
+++ b/checkbuild.py
@@ -246,7 +246,7 @@
         triple = fixup_toolchain_triple(toolchain)
         tmpdir = tempfile.mkdtemp()
         try:
-            install_dir = os.path.join(tmpdir, 'binutils', toolchain)
+            install_dir = os.path.join(tmpdir, 'binutils', triple)
             os.makedirs(install_dir)
             is_windows = host_tag.startswith('windows')
             has_gold = not triple.startswith('mips') and not is_windows