rattler-build is the fastest package build tool for Conda packages

Build packages fast

Our tool "rattler-build" turns a well-specified YAML recipe file and creates a standard Conda package from it. It's much faster than conda-build.

Documentation

A versatile YAML based recipe format

Simple recipes

rattler-build uses a simple, yet powerful recipe format based on YAML. It is always guaranteed to be parseable as YAML and easily scriptable. For more control, you can also use the Python interface to rattler-build.

recipe.yaml

package:
  name: python
  version: 3.14.0a7

source:
  - url: https://github.com/python/cpython/archive/refs/tags/v3.14.0a7.tar.gz
    sha256: ad83cda00a8a30adbad263d8e25455397be0641ded65d731b78ec178ed74570c

build:
  script:
    - export LDFLAGS="-headerpad_max_install_names $LDFLAGS"
    - ./configure --enable-shared --prefix $PREFIX
    - make -j${CPU_COUNT}
    - make install

requirements:
  build:
    - ${{ compiler('c') }}
    - ${{ compiler('cxx') }}
    - make
    - libtool
    - pkg-config
    - llvm-tools
    - python 3.13.*

Integrates with Github Actions and friends

CI Integration

rattler-build natively integrates with Github Actions and produces summary files. We make it easy to run entire package distributions from a single, short Github workflow – the heavy lifting is done by rattler-build.

Reproducible builds

Rebuildable!

We designed rattler-build to allow for perfect reproducibility – for nerds who want extra security. We set the $SOURCE_DATE_EPOCH variable and all the other tricks from https://reproducible-builds.org.