There is an updated pull request by r-ricci against master on the void-packages repository

https://github.com/r-ricci/void-packages ccache-compress
https://github.com/void-linux/void-packages/pull/38986

xbps-src: don't export CCACHE_COMPRESS=1
Compression is enabled by default since ccache 4.0 and this variable
prevents disabling it through a config file (useful e.g. on compressed
filesystems).


AFAIK there's no way to disable compression when `CCACHE_COMPRESS` is present, since the environment has the highest precedence, according to the manual:

```
The priorities of configuration options are as follows (where 1 is highest):

 1. Environment variables.

 2. The primary (cache-specific) configuration file (see below).

 3. The secondary (system-wide read-only) configuration file
     <sysconfdir>/ccache.conf (typically /etc/ccache.conf or
     /usr/local/etc/ccache.conf).

 5. Compile-time defaults.
```

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A patch file from https://github.com/void-linux/void-packages/pull/38986.patch is attached