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-rw-r--r--src/nix-instantiate/main.cc6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/nix-instantiate/main.cc b/src/nix-instantiate/main.cc
index b3a8e68705c8..75d03f329bf6 100644
--- a/src/nix-instantiate/main.cc
+++ b/src/nix-instantiate/main.cc
@@ -100,8 +100,10 @@ void run(Strings args)
     for (Strings::iterator i = files.begin();
          i != files.end(); i++)
     {
-        Expr e = evalFile(state, absPath(*i));
-        /* !!! parseOnly ignored */
+        Path path = absPath(*i);
+        Expr e = parseOnly
+            ? parseExprFromFile(state, path)
+            : evalFile(state, path);
         printResult(state, e, evalOnly);
     }