diff --git a/libnixf/src/Sema/VariableLookup.cpp b/libnixf/src/Sema/VariableLookup.cpp
index 6766a969f..b4db77202 100644
--- a/libnixf/src/Sema/VariableLookup.cpp
+++ b/libnixf/src/Sema/VariableLookup.cpp
@@ -53,8 +53,10 @@ void VariableLookupAnalysis::lookupVar(const ExprVar &Var,
   EnvNode *CurEnv = Env.get();
   std::shared_ptr<Definition> Def;
   for (; CurEnv; CurEnv = CurEnv->parent()) {
-    if (CurEnv->defs().contains(Name))
+    if (CurEnv->defs().contains(Name)) {
       Def = CurEnv->defs().at(Name);
+      break;
+    }
     // Find the most nested `with` expression, and set uses.
     if (CurEnv->isWith() && !EnclosedWith) {
       EnclosedWith = true;
diff --git a/libnixf/test/Sema/VariableLookup.cpp b/libnixf/test/Sema/VariableLookup.cpp
index f900bd6f3..b6f18d038 100644
--- a/libnixf/test/Sema/VariableLookup.cpp
+++ b/libnixf/test/Sema/VariableLookup.cpp
@@ -133,8 +133,7 @@ TEST_F(VLATest, LivenessNested) {
   ASSERT_EQ(Diags.size(), 1);
 
   ASSERT_EQ(Diags[0].kind(), Diagnostic::DK_DefinitionNotUsed);
-  // FIXME: this should be place at 'let y = 1;'
-  ASSERT_EQ(Diags[0].range().lCur().column(), 17);
+  ASSERT_EQ(Diags[0].range().lCur().column(), 8);
   ASSERT_EQ(Diags[0].tags().size(), 1);
   ASSERT_EQ(Diags[0].tags()[0], DiagnosticTag::Faded);
 }