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-rw-r--r--src/libexpr/tests/libexpr.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libexpr/tests/libexpr.hh b/src/libexpr/tests/libexpr.hh
index 69c932f05..b8e65aafe 100644
--- a/src/libexpr/tests/libexpr.hh
+++ b/src/libexpr/tests/libexpr.hh
@@ -28,7 +28,7 @@ namespace nix {
}
Value eval(std::string input, bool forceValue = true) {
Value v;
- Expr * e = state.parseExprFromString(input, "");
+ Expr * e = state.parseExprFromString(input, state.rootPath(CanonPath::root));
assert(e);
state.eval(e, v);
if (forceValue)