Compiling synapse v0.1.0 (/var/tmp/paludis/build/net-synapse-1.68.0rc1/work/matrix-synapse-1.68.0rc1/rust)
     Running `rustc --crate-name synapse --edition=2021 rust/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type cdylib --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no --crate-type cdylib -C metadata=71f8cac97d837ea8 --out-dir /var/tmp/paludis/build/net-synapse-1.68.0rc1/work/matrix-synapse-1.68.0rc1/target/release/deps -L dependency=/var/tmp/paludis/build/net-synapse-1.68.0rc1/work/matrix-synapse-1.68.0rc1/target/release/deps --extern pyo3=/var/tmp/paludis/build/net-synapse-1.68.0rc1/work/matrix-synapse-1.68.0rc1/target/release/deps/libpyo3-c4fa1009b364ab5a.rlib`
error: environment variable `SYNAPSE_RUST_DIGEST` not defined
 --> rust/src/lib.rs:8:5
  |
8 |     env!("SYNAPSE_RUST_DIGEST")
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the macro `env` (in Nightly builds, run with -Z macro-backtrace for more info)

error: could not compile `synapse` due to previous error

Caused by:
  process didn't exit successfully: `rustc --crate-name synapse --edition=2021 rust/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type cdylib --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no --crate-type cdylib -C metadata=71f8cac97d837ea8 --out-dir /var/tmp/paludis/build/net-synapse-1.68.0rc1/work/matrix-synapse-1.68.0rc1/target/release/deps -L dependency=/var/tmp/paludis/build/net-synapse-1.68.0rc1/work/matrix-synapse-1.68.0rc1/target/release/deps --extern pyo3=/var/tmp/paludis/build/net-synapse-1.68.0rc1/work/matrix-synapse-1.68.0rc1/target/release/deps/libpyo3-c4fa1009b364ab5a.rlib` (exit status: 1)