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-rw-r--r--src/libstore/build.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index de0ce9ae1..5d681d279 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -1985,7 +1985,7 @@ void DerivationGoal::startBuilder()
throw BuildError(format("odd number of tokens in 'exportReferencesGraph': '%1%'") % s);
for (Strings::iterator i = ss.begin(); i != ss.end(); ) {
string fileName = *i++;
- static std::regex regex("[A-Za-z_][A-Za-z0-9_.]*");
+ static std::regex regex("[A-Za-z_][A-Za-z0-9_.-]*");
if (!std::regex_match(fileName, regex))
throw Error("invalid file name '%s' in 'exportReferencesGraph'", fileName);