Colin
61df81291b
lifting `let` bindings up where possible helps reduce the number of thunks nix has to allocate. this patch only does that by 0.3%-ish, though
28 lines
781 B
Nix
28 lines
781 B
Nix
# this overlay exists specifically to control the order in which other overlays are applied.
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# for example, `pkgs` *must* be added before `cross`, as the latter applies overrides
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# to the packages defined in the former.
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let
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pkgs = import ./pkgs.nix;
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preferences = import ./preferences.nix;
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cross = import ./cross.nix;
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pkgs-ccache = import ./pkgs-ccache.nix;
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pkgs-debug = import ./pkgs-debug.nix;
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in
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final: prev:
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let
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isCross = prev.stdenv.hostPlatform != prev.stdenv.buildPlatform;
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ifCross = overlay: if isCross then overlay else (_: _: {});
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renderOverlays = overlays: builtins.foldl'
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(acc: thisOverlay: acc // (thisOverlay final acc))
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prev
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overlays;
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in
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renderOverlays [
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pkgs
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preferences
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(ifCross cross)
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pkgs-ccache
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pkgs-debug
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]
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