cargo +nightly install --path .
cargo  install frawk
cargo +nightly install --path . --no-default-features --features use_jemalloc,allow_avx2,unstable
cargo +nightly install --path . --no-default-features --features allow_avx2,unstable

error[E0599]: no method named `multiple` found for struct `clap::Arg` in the current scope
   --> src/main.rs:306:15
    |
306 |              .multiple(true)
    |               ^^^^^^^^ method not found in `clap::Arg<'_>`

error[E0599]: no method named `multiple` found for struct `clap::Arg` in the current scope
   --> src/main.rs:329:15
    |
329 |              .multiple(true)
    |               ^^^^^^^^ method not found in `clap::Arg<'_>`

error[E0599]: no method named `multiple` found for struct `clap::Arg` in the current scope
   --> src/main.rs:350:15
    |
350 |              .multiple(true))
    |               ^^^^^^^^ method not found in `clap::Arg<'_>`

For more information about this error, try `rustc --explain E0599`.
warning: `frawk` (bin "frawk") generated 2 warnings
error: failed to compile `frawk v0.4.2 (/usr/src/myapp)`, intermediate artifacts can be found at `/usr/src/myapp`

# cargo --version
cargo 1.56.0-nightly (e96bdb0c3 2021-08-17)
# rustc --version
rustc 1.56.0-nightly (ad02dc46b 2021-08-26)
# rustup --version
rustup 1.24.3 (ce5817a94 2021-05-31)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.56.0-nightly (ad02dc46b 2021-08-26)`