* toXML: propagate the context to allow derivations to be used in the

  argument.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 926ea7b809..babd6df37b 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -507,8 +507,9 @@ static Expr primToPath(EvalState & state, const ATermVector & args)
 static Expr primToXML(EvalState & state, const ATermVector & args)
 {
     std::ostringstream out;
-    printTermAsXML(strictEvalExpr(state, args[0]), out);
-    return makeStr(toATerm(out.str()));
+    ATermList context = ATempty;
+    printTermAsXML(strictEvalExpr(state, args[0]), out, context);
+    return wrapInContext(context, makeStr(toATerm(out.str())));
 }