diff --git a/pkgs/os-specific/linux/fwts/default.nix b/pkgs/os-specific/linux/fwts/default.nix
index 6fd7dc8e99d1..13560cd6a965 100644
--- a/pkgs/os-specific/linux/fwts/default.nix
+++ b/pkgs/os-specific/linux/fwts/default.nix
@@ -16,16 +16,18 @@
   libbsd,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "fwts";
-  version = "24.09.00";
+  version = "25.09.00";
 
   src = fetchzip {
-    url = "https://fwts.ubuntu.com/release/fwts-V${version}.tar.gz";
-    hash = "sha256-ZJSlx8O38e7bJYTgZacayslr28TLHHJsISXq9Uzsnyc=";
+    url = "https://fwts.ubuntu.com/release/fwts-V${finalAttrs.version}.tar.gz";
+    hash = "sha256-OJI2O9MptckmGj4rTrh9haIGaXJOO3er59yIorbgSVw=";
     stripRoot = false;
   };
 
+  sourceRoot = "${finalAttrs.src.name}/fwts-${finalAttrs.version}";
+
   nativeBuildInputs = [
     autoreconfHook
     pkg-config
@@ -64,4 +66,4 @@ stdenv.mkDerivation rec {
     license = lib.licenses.gpl2Plus;
     maintainers = with lib.maintainers; [ tadfisher ];
   };
-}
+})
diff --git a/pkgs/os-specific/linux/fwts/module.nix b/pkgs/os-specific/linux/fwts/module.nix
index 76326198b8be..922abd9019ec 100644
--- a/pkgs/os-specific/linux/fwts/module.nix
+++ b/pkgs/os-specific/linux/fwts/module.nix
@@ -6,13 +6,13 @@
   kernelModuleMakeFlags,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "fwts-efi-runtime";
   version = "${fwts.version}-${kernel.version}";
 
   inherit (fwts) src;
 
-  sourceRoot = "${src.name}/efi_runtime";
+  sourceRoot = "${fwts.sourceRoot}/efi_runtime";
 
   postPatch = ''
     substituteInPlace Makefile --replace \
@@ -34,4 +34,4 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ dtzWill ];
     platforms = platforms.linux;
   };
-}
+})