error: No hash was found while vendoring the git dependency sysinfo-0.33.1. You can add
a hash through the `outputHashes` argument of `importCargoLock`:

outputHashes = {
  "sysinfo-0.33.1" = "<hash>";
};

If you use `buildRustPackage`, you can add this attribute to the `cargoLock`
attribute set.

sentry-relay> pypa build flags: --no-isolation --outdir dist/ --wheel
sentry-relay> * Getting build dependencies for wheel...
sentry-relay> * Building wheel...
sentry-relay> running bdist_wheel
sentry-relay> running build
sentry-relay> running build_py
sentry-relay> creating build/lib/sentry_relay
sentry-relay> copying sentry_relay/__init__.py -> build/lib/sentry_relay
sentry-relay> copying sentry_relay/processing.py -> build/lib/sentry_relay
sentry-relay> copying sentry_relay/utils.py -> build/lib/sentry_relay
sentry-relay> copying sentry_relay/exceptions.py -> build/lib/sentry_relay
sentry-relay> copying sentry_relay/auth.py -> build/lib/sentry_relay
sentry-relay> copying sentry_relay/consts.py -> build/lib/sentry_relay
sentry-relay> copying sentry_relay/py.typed -> build/lib/sentry_relay
sentry-relay>     Updating crates.io index
sentry-relay> warning: spurious network error (3 tries remaining): [6] Could not resolve hostname (Could not resolve host: index.crates.io)
sentry-relay> warning: spurious network error (2 tries remaining): [6] Could not resolve hostname (Could not resolve host: index.crates.io)
sentry-relay> warning: spurious network error (1 tries remaining): [6] Could not resolve hostname (Could not resolve host: index.crates.io)
sentry-relay>     Updating git repository `https://github.com/getsentry/sysinfo.git`
sentry-relay> warning: spurious network error (3 tries remaining): failed to resolve address for github.com: Temporary failure in name resolution; class=Net (12)
sentry-relay> warning: spurious network error (2 tries remaining): failed to resolve address for github.com: Temporary failure in name resolution; class=Net (12)
sentry-relay> warning: spurious network error (1 tries remaining): failed to resolve address for github.com: Temporary failure in name resolution; class=Net (12)
sentry-relay> error: failed to get `sysinfo` as a dependency of package `relay-server v25.4.0 (/build/source/relay-server)`
sentry-relay> 
sentry-relay> Caused by:
sentry-relay>   failed to load source for dependency `sysinfo`
sentry-relay> 
sentry-relay> Caused by:
sentry-relay>   Unable to update https://github.com/getsentry/sysinfo.git?rev=15b3be3273ba286740122fed7bb7dccd2a79dc8f#15b3be32
sentry-relay> 
sentry-relay> Caused by:
sentry-relay>   failed to clone into: /build/.home/.cargo/git/db/sysinfo-bfa15ca2329ff574
sentry-relay> 
sentry-relay> Caused by:
sentry-relay>   revision 15b3be3273ba286740122fed7bb7dccd2a79dc8f not found
sentry-relay> 
sentry-relay> Caused by:
sentry-relay>   network failure seems to have happened
sentry-relay>   if a proxy or similar is necessary `net.git-fetch-with-cli` may help here
sentry-relay>   https://doc.rust-lang.org/cargo/reference/config.html#netgit-fetch-with-cli
sentry-relay> 
sentry-relay> Caused by:
sentry-relay>   failed to resolve address for github.com: Temporary failure in name resolution; class=Net (12)
sentry-relay> 
sentry-relay> ERROR Backend subprocess exited when trying to invoke build_wheel

In reply to @hexa:lossy.network
trying to package https://github.com/getsentry/relay/tree/25.4.0 and I'm hitting a bump in the road

You could try using rustPlatform.fetchCargoVendor instead, hopefully it will have more obvious error messages

(also it doesn't need a hash for every git dep)