diff --git a/pkgs/os-specific/linux/nvidia-x11/fabricmanager.nix b/pkgs/os-specific/linux/nvidia-x11/fabricmanager.nix
index cc11ad9d745e..9880425393dd 100644
--- a/pkgs/os-specific/linux/nvidia-x11/fabricmanager.nix
+++ b/pkgs/os-specific/linux/nvidia-x11/fabricmanager.nix
@@ -12,7 +12,7 @@ nvidia_x11: sha256:
 let
   sys = lib.concatStringsSep "-" (lib.reverseList (lib.splitString "-" stdenv.system));
   bsys = builtins.replaceStrings [ "_" ] [ "-" ] sys;
-  fmver = nvidia_x11.version;
+  fmver = nvidia_x11.fabricmanagerVersion;
   ldd = (lib.getBin glibc) + "/bin/ldd";
 in
 
diff --git a/pkgs/os-specific/linux/nvidia-x11/generic.nix b/pkgs/os-specific/linux/nvidia-x11/generic.nix
index eebfe4097e17..baed507561fc 100644
--- a/pkgs/os-specific/linux/nvidia-x11/generic.nix
+++ b/pkgs/os-specific/linux/nvidia-x11/generic.nix
@@ -10,7 +10,7 @@
   persistencedSha256 ? null,
   persistencedVersion ? null,
   fabricmanagerSha256 ? null,
-  fabricmanagerVersion ? version,
+  fabricmanagerVersion ? null,
   useGLVND ? true,
   useProfiles ? true,
   preferGtk2 ? false,
@@ -313,6 +313,8 @@ stdenv.mkDerivation (finalAttrs: {
       settingsVersion = if settingsVersion != null then settingsVersion else finalAttrs.version;
       persistencedVersion =
         if persistencedVersion != null then persistencedVersion else finalAttrs.version;
+      fabricmanagerVersion =
+        if fabricmanagerVersion != null then fabricmanagerVersion else finalAttrs.version;
       compressFirmware = false;
       ibtSupport = ibtSupport || (lib.versionAtLeast version "530");
     }