diff --git a/pkgs/by-name/bi/biblesync/package.nix b/pkgs/by-name/bi/biblesync/package.nix
index 486244f71329..58201c9ea269 100644
--- a/pkgs/by-name/bi/biblesync/package.nix
+++ b/pkgs/by-name/bi/biblesync/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   pkg-config,
   cmake,
   libuuid,
@@ -19,6 +20,15 @@ stdenv.mkDerivation rec {
     sha256 = "0prmd12jq2cjdhsph5v89y38j7hhd51dr3r1hivgkhczr3m5hf4s";
   };
 
+  patches = [
+    # Fix cmake-4 support
+    (fetchpatch {
+      name = "cmake-4.patch";
+      url = "https://github.com/karlkleinpaste/biblesync/commit/4b00f9fd3d0c858947eee18206ef44f9f6bd2283.patch?full_index=1";
+      hash = "sha256-CVYhYBDneLN3Ogvye01EQCc9zxjSwaKBzk1fBaKINug=";
+    })
+  ];
+
   nativeBuildInputs = [
     pkg-config
     cmake