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Merge pull request #106954 from r-burns/randomseed 

[staging] stdenv: trim random seed to avoid reference cycles
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Andreas Rammhold 2021-01-02 11:01:34 +01:00 committed by GitHub
parent 3050545e41 61a6d1aae2
commit c2884c4011
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1 changed files with 6 additions and 1 deletions
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7
pkgs/build-support/setup-hooks/reproducible-builds.sh
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@ -1,4 +1,9 @@
# Use the last part of the out path as hash input for the build.
# This should ensure that it is deterministic across rebuilds of the same
# derivation and not easily collide with other builds.
export NIX_CFLAGS_COMPILE+=" -frandom-seed=${out##*/}"
# We also truncate the hash so that it cannot cause reference cycles.
export NIX_CFLAGS_COMPILE+=" -frandom-seed=$(
outbase="${out##*/}"
randomseed="${outbase:0:10}"
echo $randomseed
)"