Luke Granger-Brown
57725ef3ec
git-subtree-dir: third_party/nixpkgs git-subtree-split: 76612b17c0ce71689921ca12d9ffdc9c23ce40b2
11 lines
492 B
Bash
11 lines
492 B
Bash
# Use the last part of the out path as hash input for the build.
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# This should ensure that it is deterministic across rebuilds of the same
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# derivation and not easily collide with other builds.
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# We also truncate the hash so that it cannot cause reference cycles.
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NIX_CFLAGS_COMPILE="${NIX_CFLAGS_COMPILE:-} -frandom-seed=$(
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randSeed=${NIX_OUTPATH_USED_AS_RANDOM_SEED:-$out}
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outbase="${randSeed##*/}"
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randomseed="${outbase:0:10}"
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echo $randomseed
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)"
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export NIX_CFLAGS_COMPILE
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