GOALS:
-------------------------------------------------------------------------------
* compile
  * GNU Autoconf
  * GNU GCC
* platforms:
  * Linux:
    * "i386-linux" "x86_64-linux"
      "armv6l-linux" "armv7l-linux" "aarch64-linux"
      "powerpc64le-linux"
      "riscv64-linux"
    * "x86_64-darwin" "aarch64-darwin"
  * Windows 10+ 64bit
    * "mingw-w64" (zicross or nixcrpkgs?)
  * Raspberry Pi?
    * "armv7l-hf-multiplatform" (ARMv7, v8? v8.2?)
    * "aarch64-hf-multiplatform" (AArch64)
  * VM image/OSv
    * x86_64, arm?, (kvm, firecracker, hyper-v, ...)
* docker:
  * "x86_64-linux", "aarch64-linux" (AWS/EC2 Graviton 1/2)
  * upload/publish all artifacts
* installers/packages
  * tgz of source for release
  * tgz for binaries
  * deb, rpm, flake, WiX (Windows)
    * signed and published
  * macOS?
  * asdf?
* CI/CD
  * GHA/Actuated.dev

-------------------------------------------------------------------------------
* Gitpod
* README.md
  * build and other badges

-----
nix flake show
nix flake check
nix shell github:gburd/hello -c hello
nix flake show --json | jq  '.packages."x86_64-linux"|keys[]'| xargs -I {} nix build .#{}