diff --git a/bootstrap/manifest.txt b/bootstrap/manifest.txt
index a2d8e8152..a80ee5f6b 100644
--- a/bootstrap/manifest.txt
+++ b/bootstrap/manifest.txt
@@ -17,8 +17,9 @@
 
 $VerifiedPlatform windows-amd64 linux-amd64 mac-amd64
 
+# TODO(https://crbug.com/1184768): Remove `=amd64` once mac/arm64 python exists
 @Subdir python
-infra/3pp/tools/cpython/${platform} version:2@2.7.18.chromium.32
+infra/3pp/tools/cpython/${os}-${arch=amd64} version:2@2.7.18.chromium.32
 
 @Subdir python3
 infra/3pp/tools/cpython3/${platform} version:2@3.8.9.chromium.14