diff --git a/.bazelrc.sandboxroot b/.bazelrc.sandboxroot
index 5565210..5fce09a 100644
--- a/.bazelrc.sandboxroot
+++ b/.bazelrc.sandboxroot
@@ -2,6 +2,10 @@
 
 startup --batch_cpu_scheduling --io_nice_level 7
 build --incompatible_strict_action_env=true
+build --action_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1
+
+# No host CC platform - we only want pure Go for the sandboxroot
+build --host_platform=@io_bazel_rules_go//go/toolchain:linux_amd64
 
 # Shared with main .bazelrc
 try-import %workspace%/.bazelrc.user