Building on FreeBSD

[rihadik]

Anyone had any luck building Vector on FreeBSD? I tried my best but got stopped by this error:

   Compiling nix v0.23.2
error[E0308]: mismatched types
   --> /home/rihad/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/nix-0.23.2/src/sys/event.rs:231:19
    |
231 |             data: data as type_of_data,
    |                   ^^^^^^^^^^^^^^^^^^^^ expected `i64`, found `isize`

error[E0063]: missing field `ext` in initializer of `kevent`
   --> /home/rihad/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/nix-0.23.2/src/sys/event.rs:226:26
    |
226 |         KEvent { kevent: libc::kevent {
    |                          ^^^^^^^^^^^^ missing `ext`

   Compiling uom v0.31.1
Some errors have detailed explanations: E0063, E0308.
For more information about an error, try `rustc --explain E0063`.
error: could not compile `nix` (lib) due to 2 previous errors
warning: build failed, waiting for other jobs to finish...
gmake: *** [Makefile:208: build] Error 101

[pront]

Thanks for the report. I reproduced these exact errors by cross-checking Vector’s dependencies for x86_64-unknown-freebsd.

The immediate failure is an incompatibility between nix 0.23.2, pulled in through heim, and the newer FreeBSD kevent definition exposed by libc. The proper fix is replacing the unmaintained heim dependency with sysinfo. This is tracked in #20414, with migration work underway in #24818 and #24819.

There is not currently a complete supported workaround AFAIK.