diff --git a/ofborg/src/nix.rs b/ofborg/src/nix.rs
index caac506..3f438a3 100644
--- a/ofborg/src/nix.rs
+++ b/ofborg/src/nix.rs
@@ -349,9 +349,17 @@ fn lines_from_file(file: fs::File) -> Vec<String> {
         .lines()
         .filter(|line| line.is_ok())
         .map(|line| line.unwrap())
+        .filter(|msg| !is_user_setting_warning(msg))
         .collect()
 }
 
+fn is_user_setting_warning(line: &str) -> bool {
+    let line = line.trim();
+    line.starts_with("warning: ignoring the user-specified setting '")
+        && line.ends_with("because it is a restricted setting and you are not a trusted user")
+}
+
+
 #[cfg(test)]
 mod tests {
     fn nix() -> Nix {
diff --git a/ofborg/src/nixenv.rs b/ofborg/src/nixenv.rs
index dfbab17..fee1b8b 100644
--- a/ofborg/src/nixenv.rs
+++ b/ofborg/src/nixenv.rs
@@ -43,7 +43,6 @@ impl HydraNixEnv {
                 .collect::<Result<Vec<String>, _>>()?
                 .into_iter()
                 .filter(|msg| msg.trim().len() > 0)
-                .filter(|msg| !is_user_setting_warning(msg))
                 .collect::<Vec<String>>();
 
             if evaluation_errors.len() > 0 {
@@ -173,9 +172,3 @@ impl Error {
         }
     }
 }
-
-fn is_user_setting_warning(line: &str) -> bool {
-    let line = line.trim();
-    line.starts_with("warning: ignoring the user-specified setting '")
-        && line.ends_with("because it is a restricted setting and you are not a trusted user")
-}