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Mark __impureHostDeps paths as optional

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Starting in macOS 11, the on-disk dylib bundles are no longer available,
but nixpkgs needs to be able to keep compatibility with older versions
that require `/usr/lib/libSystem.B.dylib` in `__impureHostDeps`. Allow
it to keep backwards compatibility with these versions by marking these
dependencies as optional.

Fixes #4658.

(cherry picked from commit c4355a52fa)
Signed-off-by: Domen Kožar <domen@dev.si>
This commit is contained in:
Emily 2021-05-02 05:30:50 +01:00 • committed by Domen Kožar
parent 998fe9d645
commit 405d78eafc
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1 changed files with 3 additions and 1 deletions
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4
src/libstore/build.cc
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@ -2065,7 +2065,9 @@ void DerivationGoal::startBuilder()
if (!found)
throw Error(format("derivation '%1%' requested impure path '%2%', but it was not in allowed-impure-host-deps") % drvPath % i);
dirsInChroot[i] = i;
/* Allow files in __impureHostDeps to be missing; e.g.
macOS 11+ has no /usr/lib/libSystem*.dylib */
dirsInChroot[i] = {i, true};
}
#if __linux__