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reformat system-features setting documentation

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Valentin Gagarin 2023-07-17 11:28:27 +02:00
parent feb01b22ed
commit 493ddf617f
1 changed files with 11 additions and 9 deletions
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20
src/libstore/globals.hh
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@ -689,19 +689,21 @@ public:
getDefaultSystemFeatures(),
"system-features",
R"(
A set of system “features” supported by this machine, e.g. `kvm`.
Derivations can express a dependency on such features through the
derivation attribute `requiredSystemFeatures`. For example, the
attribute
A set of system “features” supported by this machine.
Derivations can express a dependency on such features through the derivation attribute `requiredSystemFeatures`.
For example, the attribute
requiredSystemFeatures = [ "kvm" ];
ensures that the derivation can only be built on a machine with the
`kvm` feature.
ensures that the derivation can only be built on a machine with the `kvm` feature.
This setting by default includes `kvm` if `/dev/kvm` is accessible,
and the pseudo-features `nixos-test`, `benchmark` and `big-parallel`
that are used in Nixpkgs to route builds to specific machines.
This setting by default includes
- `kvm` if `/dev/kvm` is accessible
- historical pseudo-features for backwards compatibility, used in Nixpkgs to route Hydra builds to specific machines
- `nixos-test`
- `benchmark`
- `big-parallel`
)", {}, false};
Setting<Strings> substituters{