diff options
Diffstat (limited to 'src/libstore/build.cc')
| -rw-r--r-- | src/libstore/build.cc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc index f901c1f7d99e..a53c23bf447d 100644 --- a/src/libstore/build.cc +++ b/src/libstore/build.cc @@ -1411,6 +1411,9 @@ void DerivationGoal::startBuilder() in the store or in the build directory). */ env["NIX_STORE"] = nixStore; + /* The maximum number of cores to utilize for parallel building. */ + env["NIX_BUILD_CORES"] = (format("%d") % buildCores).str(); + /* Add all bindings specified in the derivation. */ foreach (StringPairs::iterator, i, drv.env) env[i->first] = i->second; |