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| author | John Ericson <jericson@galois.com> | 2016-10-12 15:14:49 -0400 |
|---|---|---|
| committer | John Ericson <jericson@galois.com> | 2016-10-13 11:14:11 -0400 |
| commit | e4cd45a30c92a19a240df835cdaf6da5f76ea9fc (patch) | |
| tree | fc234aeb6b3b5714be3c6db9e1c0607496d258d1 /doc/functions.xml | |
| parent | da36847d925058fd86f027b64cc712c57be11ad8 (diff) | |
top-level: Make `overridePackages` extend rather than replace existing overrides
Diffstat (limited to 'doc/functions.xml')
| -rw-r--r-- | doc/functions.xml | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/doc/functions.xml b/doc/functions.xml index 908e9571ed69..e767d01d8431 100644 --- a/doc/functions.xml +++ b/doc/functions.xml @@ -52,6 +52,20 @@ in ...</programlisting> It's equivalent to <varname>pkgs</varname> in the above example. </para> + <para> + Note that in previous versions of nixpkgs, this method replaced any changes from <link + linkend="sec-modify-via-packageOverrides">config.packageOverrides</link>, + along with that from previous calls if this function was called repeatedly. + Now those previous changes will be preserved so this function can be "chained" meaningfully. + To recover the old behavior, make sure <varname>config.packageOverrides<varname> is unset, + and call this only once off a "freshly" imported nixpkgs: + + <programlisting>let + pkgs = import <nixpkgs> { config: {}; }; + newpkgs = pkgs.overridePackages ...; +in ...</programlisting> + </para> + </section> <section xml:id="sec-pkg-override"> |