flake.nix          — Entry point, defines packages and dev shell
├── nix/default.nix — Build derivation: configures env, runs nim <task> sds.nims
├── nix/shell.nix   — Dev shell: sets up NIMBLE_DIR, nimble-links, NIM_LIB_DIR
└── nix/tools.nix   — Helper: extracts version from sds.nimble

The nimbusBuildSystem flake input is used only for its pinned Nim compiler. All build logic lives in sds.nimble (nimble tasks).

Shell

A development shell can be started using:

nix develop '.?submodules=1'

This automatically:

Runs scripts/generate_nimble_links.sh to set up vendored dependencies
Exports NIMBLE_DIR and NIM_LIB_DIR
Creates the sds.nims symlink

Building

nix build '.?submodules=1#libsds'
nix build '.?submodules=1#libsds-android-arm64'

The ?submodules=1 part is required because vendored dependencies are git submodules. For more details see: https://github.com/NixOS/nix/issues/4423

Testing

nix flake check '.?submodules=1'

Or inside the dev shell:

nimble test