linuxPackages.dpdk-kmods: move env variables into env for structuredAttrs (#502561)

pkgs/os-specific/linux/dpdk-kmods/default.nix

@@ -6,13 +6,13 @@
   kernelModuleMakeFlags,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "dpdk-kmods";
   version = "2023-02-05";
 
   src = fetchzip {
     url = "https://git.dpdk.org/dpdk-kmods/snapshot/dpdk-kmods-e721c733cd24206399bebb8f0751b0387c4c1595.tar.xz";
-    sha256 = "sha256-AG5Lthp+CPR4R7I23DUmoWAmET8gLEFHHdjk2TUbQn4=";
+    hash = "sha256-AG5Lthp+CPR4R7I23DUmoWAmET8gLEFHHdjk2TUbQn4=";
   };
 
   hardeningDisable = [ "pic" ];
@@ -20,14 +20,15 @@ stdenv.mkDerivation rec {
   makeFlags = kernelModuleMakeFlags ++ [
     "INSTALL_MOD_PATH=${placeholder "out"}"
   ];
-  KSRC = "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build";
+
+  env.KSRC = "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build";
 
   nativeBuildInputs = kernel.moduleBuildDependencies;
 
   preBuild = "cd linux/igb_uio";
 
   installPhase = ''
-    make -C ${KSRC} M=$(pwd) modules_install $makeFlags
+    make -C ${finalAttrs.env.KSRC} M=$(pwd) modules_install $makeFlags
   '';
 
   enableParallelBuilding = true;
@@ -39,4 +40,4 @@ stdenv.mkDerivation rec {
     maintainers = [ lib.maintainers.mic92 ];
     platforms = lib.platforms.linux;
   };
-}
+})