diff --git a/nix/overlays/iosevka.nix b/nix/overlays/iosevka.nix
index b161be51..a22bf34b 100644
--- a/nix/overlays/iosevka.nix
+++ b/nix/overlays/iosevka.nix
@@ -51,9 +51,10 @@ final: prev: rec {
       };
 
       weights = {
+        # Build 580, but indicate 400 in output
         Regular.shape = 580;
-        Regular.menu = 580;
-        Regular.css = 580;
+        Regular.menu = 400;
+        Regular.css = 400;
         Bold.shape = 700;
         Bold.menu = 700;
         Bold.css = 700;