The release of 0.23 seems to have broken 0.22 builds.
The specific error is

error[E0599]: no method named `to_primitive_values` found for type `pnet_base::MacAddr` in the current scope
   --> …/target/armv7-unknown-linux-gnueabihf/release/build/pnet_packet-242d82d1735b29fa/out/ethernet.rs:442:24
    |
442 |         let vals = val.to_primitive_values();
    |                        ^^^^^^^^^^^^^^^^^^^ method not found in `pnet_base::MacAddr`

After chasing the dependency chain my understanding of this is as follows:
pnet 0.22 depends on pnet_packet 0.22. This in turn depends on pnet_macros_support 0.22 and pnet_base 0.22.
pnet_macros_support however depends on pnet_base >= 0.22.
With the release of 0.23 pnet_macros_support therefore began pulling in pnet_base 0.23. This means that the ToPrimitives implementation in pnet_macros_support is now for the types defined in pnet_base 0.23, not the ones in pnet_base 0.22.

A fix would likely be releasing pnet_macro_support 0.22.1 that depends on pnet_base 0.22 instead of pnet_base >= 0.22.