epsonscan2: fix build with CMake 4

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

pkgs/by-name/ep/epsonscan2/package.nix

@@ -105,6 +105,9 @@ stdenv.mkDerivation {
     # The non-free (Debian) packages uses this directory structure so do the same when compiling
     # from source so we can easily merge them.
     "-DCMAKE_INSTALL_LIBDIR=lib/${system}-gnu"
+    # There are many CMakeLists.txt files with various minimum versions. It's much easier to set this
+    # here, instead of substituting those everywhere
+    "-DCMAKE_POLICY_VERSION_MINIMUM=3.10"
   ]
   ++ lib.optionals (!withGui) [
     "-DNO_GUI=ON"