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-rw-r--r--src/libexpr/eval.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 814c19efccf0..4c448ff51acc 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -136,6 +136,7 @@ EvalState::EvalState()
     , sType(symbols.create("type"))
     , sMeta(symbols.create("meta"))
     , sName(symbols.create("name"))
+    , sValue(symbols.create("value"))
     , sSystem(symbols.create("system"))
     , sOverrides(symbols.create("__overrides"))
     , sOutputs(symbols.create("outputs"))