How do I build a static library for TCMalloc without using Bazel?

Hi! I've been trying to package TCMalloc in Nix for use in Jane Street, and have been running into issues with the Bazel-based build process - it's basically impossible to provide, eg, pre-downloaded dependencies for Bazel, rather than it downloading its dependencies from the network (which it can't do both because it's running inside a Nix build sandbox, and because it's running behind a web proxy). Would it be possible to provide build instructions for making a static library for TCmalloc that use a build system other than Bazel, like cmake? Thanks!