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* Fix small typo in configuration documentation
* doc: Fix second instance of same typo
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Resolves confusion mentioned in #31045.
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matthewbauer/nixpkgs-manual-declarative-package-management
manual: add "declarative package management" section
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This section gives some details on how to setup an "environment"
without having to go through NixOS (although it could be used there
too). I’ve tried to make it straightforward and have a kind of
"tutorial" feel. Not sure if that’s appropriate for the manual, so any
recommended changes would be helpful.
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If a package's meta has `knownVulnerabilities`, like so:
stdenv.mkDerivation {
name = "foobar-1.2.3";
...
meta.knownVulnerabilities = [
"CVE-0000-00000: remote code execution"
"CVE-0000-00001: local privilege escalation"
];
}
and a user attempts to install the package, they will be greeted with
a warning indicating that maybe they don't want to install it:
error: Package ‘foobar-1.2.3’ in ‘...default.nix:20’ is marked as insecure, refusing to evaluate.
Known issues:
- CVE-0000-00000: remote code execution
- CVE-0000-00001: local privilege escalation
You can install it anyway by whitelisting this package, using the
following methods:
a) for `nixos-rebuild` you can add ‘foobar-1.2.3’ to
`nixpkgs.config.permittedInsecurePackages` in the configuration.nix,
like so:
{
nixpkgs.config.permittedInsecurePackages = [
"foobar-1.2.3"
];
}
b) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
‘foobar-1.2.3’ to `permittedInsecurePackages` in
~/.config/nixpkgs/config.nix, like so:
{
permittedInsecurePackages = [
"foobar-1.2.3"
];
}
Adding either of these configurations will permit this specific
version to be installed. A third option also exists:
NIXPKGS_ALLOW_INSECURE=1 nix-build ...
though I specifically avoided having a global file-based toggle to
disable this check. This way, users don't disable it once in order to
get a single package, and then don't realize future packages are
insecure.
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The former is still respected as a fallback for config.nix for
backwards compatibility (but not for overlays because they're a new
feature).
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By checking if the package name appears in a list, this new example allows for easy user-customization.
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