···

       
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```

     

       
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## overlays

     

       
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-
       
overlays are useful when you want to refer to refer to a package globally.

     

       
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+
       
overlays are useful when you want to refer to a package globally.

     

       
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the gist of overlays is as thus:

     

       
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-
       
> overlay is just `prev: final: {}` functions where dumbed down idea is

     

       
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+
       
> overlay is just `final: pref: {}` functions where dumbed down idea is

     

       
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> that you do pkg = prev.pkg.override and refer to everything else from

     

       
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> final

     

       
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>

     
···

       
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(poorly made) example overlays can be found [here](https://github.com/soopyc/nixos-config/blob/master/overlays/discord-canary.nix)

     

       
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*note: replace `self: super:` with `prev: final:` for consistency*

     

       
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+
       
*note: replace `self: super:` with `final: prev:` for consistency*

     

       
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*concept and content by \@natsukagami*

     

       
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