nvidia-docker: split out libnvidia-container into separate drv

pkgs/applications/virtualization/nvidia-docker/default.nix

···
 }:
 
 with lib; let
-  libnvidia-container = callPackage ./libnvc.nix { };
   isolatedContainerRuntimePath = linkFarm "isolated_container_runtime_path" [
     {
       name = "runc";
···
     cp nvidia-docker bin
     substituteInPlace bin/nvidia-docker --subst-var-by VERSION ${version}
 
-    cp ${libnvidia-container}/bin/nvidia-container-cli bin
     cp ${nvidia-container-toolkit}/bin/nvidia-container-{toolkit,runtime-hook} bin
     cp ${nvidia-container-runtime}/bin/nvidia-container-runtime bin
   '';
···
   installPhase = ''
     mkdir -p $out/{bin,etc}
     cp -r bin $out
-
-    wrapProgram $out/bin/nvidia-container-cli \
-      --prefix LD_LIBRARY_PATH : /run/opengl-driver/lib:/run/opengl-driver-32/lib
 
     # nvidia-container-runtime invokes docker-runc or runc if that isn't available on PATH
     wrapProgram $out/bin/nvidia-container-runtime --prefix PATH : ${isolatedContainerRuntimePath}

pkgs/applications/virtualization/nvidia-docker/libnvc.nix pkgs/applications/virtualization/libnvidia-container/default.nix

···
 , libseccomp
 , rpcsvc-proto
 , libtirpc
+, makeWrapper
+
 }:
 let
   modp-ver = "450.57";
···
 
   src = fetchFromGitHub {
     owner = "NVIDIA";
-    repo = "libnvidia-container";
+    repo = pname;
     rev = "v${version}";
     sha256 = "0j6b8z9x9hrrs4xp11zyjjd7kyl7fzcicpiis8k1qb1q2afnqsrq";
   };
···
     popd
   '';
 
+  postInstall = ''
+    wrapProgram $out/bin/nvidia-container-cli \
+      --prefix LD_LIBRARY_PATH : /run/opengl-driver/lib:/run/opengl-driver-32/lib
+  '';
+
   NIX_CFLAGS_COMPILE = [ "-I${libtirpc.dev}/include/tirpc" ];
   NIX_LDFLAGS = [ "-L${libtirpc.dev}/lib" "-ltirpc" ];
 
-  nativeBuildInputs = [ pkgconfig rpcsvc-proto ];
+  nativeBuildInputs = [ pkgconfig rpcsvc-proto makeWrapper ];
 
   buildInputs = [ libelf libcap libseccomp libtirpc ];
 
···
     description = "NVIDIA container runtime library";
     license = licenses.bsd3;
     platforms = platforms.linux;
+    maintainers = with maintainers; [ cpcloud ];
   };
 }