diff --git a/pkgs/by-name/na/nanomsg/package.nix b/pkgs/by-name/na/nanomsg/package.nix
index f1487c0c0955..a84a84812822 100644
--- a/pkgs/by-name/na/nanomsg/package.nix
+++ b/pkgs/by-name/na/nanomsg/package.nix
@@ -21,7 +21,12 @@ stdenv.mkDerivation rec {
     # Add pkgconfig fix from https://github.com/nanomsg/nanomsg/pull/1085
     (fetchpatch {
       url = "https://github.com/nanomsg/nanomsg/commit/e3323f19579529d272cb1d55bd6b653c4f34c064.patch";
-      sha256 = "URz7TAqqpKxqjgvQqNX4WNSShwiEzAvO2h0hCZ2NhVY=";
+      hash = "sha256-URz7TAqqpKxqjgvQqNX4WNSShwiEzAvO2h0hCZ2NhVY=";
+    })
+    # Fix compatibility with Cmake 4.0 and up
+    (fetchpatch {
+      url = "https://github.com/nanomsg/nanomsg/commit/eb24489839de3e2419360c67cc38842f223836d9.patch";
+      hash = "sha256-yaQWWZLW4YbiI41oV0nj7zap3lEs0Gwwb9kTD6o3La8=";
     })
   ];