{ lib, fetchFromGitHub, rustPlatform }: rustPlatform.buildRustPackage rec { pname = "fend"; version = "0.1.17"; src = fetchFromGitHub { owner = "printfn"; repo = pname; rev = "v${version}"; sha256 = "sha256-Xq2UjeZiKy9BjNQ9xnC7tppEwrEtg8ZN5BVDz1bUOmw="; }; cargoSha256 = "sha256-Bf3fYHhpoX05AmTdwwdRU2YRfGVb1EmaGDm75i+Vs2w="; doInstallCheck = true; installCheckPhase = '' [[ "$($out/bin/fend "1 km to m")" = "1000 m" ]] ''; meta = with lib; { description = "Arbitrary-precision unit-aware calculator"; homepage = "https://github.com/printfn/fend"; license = licenses.mit; maintainers = with maintainers; [ djanatyn ]; }; }