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-rw-r--r--src/libexpr/attr-path.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libexpr/attr-path.cc b/src/libexpr/attr-path.cc
index c86dbeebb..06b472d8b 100644
--- a/src/libexpr/attr-path.cc
+++ b/src/libexpr/attr-path.cc
@@ -103,6 +103,8 @@ Pos findDerivationFilename(EvalState & state, Value & v, std::string what)
throw Error("package '%s' has no source location information", what);
}
+ // FIXME: is it possible to extract the Pos object instead of doing this
+ // toString + parsing?
auto pos = state.forceString(*v2);
auto colon = pos.rfind(':');