name: extra-platforms internalName: extraPlatforms type: StringSet defaultExpr: 'getDefaultExtraPlatforms()' defaultText: 'machine-specific'

System types of executables that can be run on this machine.

Lix will only build a given derivation locally when its system attribute equals any of the values specified here or in the system option.

Setting this can be useful to build derivations locally on compatible machines:

• i686-linux executables can be run on x86_64-linux machines (set by default)
• x86_64-darwin executables can be run on macOS aarch64-darwin with Rosetta 2 (set by default where applicable)
• armv6 and armv5tel executables can be run on armv7
• some aarch64 machines can also natively run 32-bit ARM code
• qemu-user may be used to support non-native platforms (though this may be slow and buggy)

Build systems will usually detect the target platform to be the current physical system and therefore produce machine code incompatible with what may be intended in the derivation. You should design your derivation's builder accordingly and cross-check the results when using this option against natively-built versions of your derivation.