diff --git a/pkgs/by-name/mu/multimarkdown/package.nix b/pkgs/by-name/mu/multimarkdown/package.nix
index b69eb9fc27d1..30a3e7d1485f 100644
--- a/pkgs/by-name/mu/multimarkdown/package.nix
+++ b/pkgs/by-name/mu/multimarkdown/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   cmake,
   perl,
   pkg-config,
@@ -18,6 +19,14 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-b6yCn0NFpONI7WwfjDOc0d2nCKMIiUXi+rsnytiNc0Q=";
   };
 
+  patches = [
+    (fetchpatch {
+      name = "multimarkdown-fix-cmake-4.patch";
+      url = "https://github.com/fletcher/MultiMarkdown-6/commit/655c0908155758e7c94858af2fb99dc992709075.patch";
+      hash = "sha256-d1b5NcBQDVnbmTvVnPyiTS8aSx/VGgRLHD0nSs+JksI=";
+    })
+  ];
+
   postPatch = ''
     patchShebangs tools/enumsToPerl.pl
   '';