diff --git a/pkgs/by-name/sa/sage/sagelib.nix b/pkgs/by-name/sa/sage/sagelib.nix
index 46d4972f94a1..5777a379e421 100644
--- a/pkgs/by-name/sa/sage/sagelib.nix
+++ b/pkgs/by-name/sa/sage/sagelib.nix
@@ -92,7 +92,9 @@ assert (!blas.isILP64) && (!lapack.isILP64);
 
 buildPythonPackage rec {
   version = src.version;
-  pname = "sagelib";
+  # Sage publishes Python metadata as "sagemath" even though this nixpkgs
+  # attribute is exposed as `sagelib`.
+  pname = "sagemath";
   src = sage-src;
   pyproject = true;