perccli: stylistic rewrite

pkgs/tools/misc/perccli/default.nix

@@ -1,6 +1,6 @@
 { lib
 , stdenvNoCC
-, fetchurl
+, fetchzip
 , rpmextract
 }:
 
@@ -8,10 +8,10 @@ stdenvNoCC.mkDerivation rec {
   pname = "perccli";
   version = "7.2110.00";
 
-  src = fetchurl {
+  src = fetchzip {
     # On pkg update: manually adjust the version in the URL because of the different format.
     url = "https://dl.dell.com/FOLDER09074160M/1/PERCCLI_7.211.0_Linux.tar.gz";
-    sha256 = "sha256-FQasejMVm80uliXOg/riGGwcsK0fSDGh1KYz9r34wBQ=";
+    sha256 = "sha256-8gk+0CrgeisfN2hNpaO1oFey57y7KuNy2i6PWTikDls=";
 
     # Dell seems to block "uncommon" user-agents, such as Nixpkgs's custom one.
     # Sending no user-agent at all seems to be fine though.
@@ -20,21 +20,32 @@ stdenvNoCC.mkDerivation rec {
 
   nativeBuildInputs = [ rpmextract ];
 
-  buildCommand = ''
-    tar xf $src
-    rpmextract perccli-00${version}00.0000-1.noarch.rpm
-    install -D ./opt/MegaRAID/perccli/perccli64 $out/bin/perccli64
-    ln -s perccli64 $out/bin/perccli
-
-    # Not needed because the binary is statically linked
-    #eval fixupPhase
+  unpackPhase = ''
+    rpmextract $src/perccli-00${version}00.0000-1.noarch.rpm
   '';
 
+  dontPatch = true;
+  dontConfigure = true;
+  dontBuild = true;
+
+  installPhase = let
+    inherit (stdenvNoCC.hostPlatform) system;
+    platforms = {
+      x86_64-linux = ''
+        install -D ./opt/MegaRAID/perccli/perccli64 $out/bin/perccli64
+        ln -s perccli64 $out/bin/perccli
+      '';
+    };
+  in platforms.${system} or (throw "unsupported system: ${system}");
+
+  # Not needed because the binary is statically linked
+  dontFixup = true;
+
   meta = with lib; {
     description = "Perccli Support for PERC RAID controllers";
     sourceProvenance = with sourceTypes; [ binaryNativeCode ];
     license = licenses.unfree;
     maintainers = with maintainers; [ panicgh ];
-    platforms = with platforms; intersectLists x86_64 linux;
+    platforms = [ "x86_64-linux" ];
   };
 }