Fails to build with python312

[adamcstephens]

openwrt> Checking 'python3-distutils'... failed.
openwrt> Checking 'python3-stdlib'... ok.
openwrt> Checking 'file'... ok.
openwrt> Checking 'which'... ok.
openwrt> Checking 'ldconfig-stub'... ok.
openwrt> Build dependency: Please install the Python3 distutils module
openwrt> Prerequisite check failed. Use FORCE=1 to override.
openwrt> make[1]: *** [Makefile:110: staging_dir/host/.prereq-build] Error 1
openwrt> make: *** [Makefile:262: image] Error 2
error: builder for '/nix/store/lxms0rv8diwa8hc3r1j1jvi688jv093g-openwrt-23.05.3-realtek-rtl838x-hpe_1920-8g.drv' failed with exit code 2;
       last 10 log lines:
       > Checking 'python3-stdlib'... ok.
       > Checking 'file'... ok.
       > Checking 'which'... ok.
       > Checking 'ldconfig-stub'... ok.
       >
       > Build dependency: Please install the Python3 distutils module
       >
       > Prerequisite check failed. Use FORCE=1 to override.

Pinning to python311 here allows the build to succeed.

https://github.com/astro/nix-openwrt-imagebuilder/blob/87a44c140567144b760a01e1cfb429daf8600d31/builder.nix#L134

[astro]

Thanks!