I used x86_64 GNU/Linux, NixOS, cargo 1.78.0-nightly (ccc84ccec 2024-02-07).
When deleting the target directory and running `cargo build`, all the dependency crates build pretty fast. But then the build script takes ages. And somehow runs twice.
In the target/debug/build dir are 2 different build-script-build executables, that produce the same outputs (compressed_syntaxes/theme).
I thought it might be related to the `cargo:rerun-if-changed` stuff in the build.rs but it's the same with those lines commented out.