Adding rtl8723bs driver recipe.

Not tested on hardware.

pkgs/os-specific/linux/rtl8723bs/default.nix

@@ -0,0 +1,35 @@
+{ stdenv, fetchFromGitHub, kernel }:
+
+let
+  ver = "c517f2b";
+in
+stdenv.mkDerivation rec {
+  name = "rtl8723bs-${kernel.version}-c517f2b";
+  
+  src = fetchFromGitHub {
+    owner = "hadess";
+    repo = "rtl8723bs";
+    rev = "c517f2bf8bcc3d57311252ea7cd49ae81466eead";
+    sha256 = "0phzrhq85g52pi2b74a9sr9l2x6dzlz714k3pix486w2x5axw4xb";
+  };
+  
+  patchPhase = ''
+    substituteInPlace ./Makefile --replace /lib/modules/ "${kernel.dev}/lib/modules/"
+    substituteInPlace ./Makefile --replace '$(shell uname -r)' "${kernel.modDirVersion}"
+    substituteInPlace ./Makefile --replace /sbin/depmod #
+    substituteInPlace ./Makefile --replace '$(MODDESTDIR)' "$out/lib/modules/${kernel.modDirVersion}/kernel/net/wireless/"
+    substituteInPlace ./Makefile --replace '/lib/firmware' "$out/lib/firmware"
+  '';
+  
+  preInstall = ''
+    mkdir -p "$out/lib/modules/${kernel.modDirVersion}/kernel/net/wireless/"
+    mkdir -p "$out/lib/firmware/rtlwifi"
+  '';
+   
+  meta = {
+    description = "Realtek SDIO Wi-Fi driver";
+    homepage = "https://github.com/hadess/rtl8723bs";
+    license = stdenv.lib.licenses.gpl2;
+    platforms = [ "x86_64-linux" "i686-linux" ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -10570,6 +10570,8 @@ let
                           # callPackage ../os-specific/linux/nvidia-x11/beta.nix { };
     nvidia_x11           = callPackage ../os-specific/linux/nvidia-x11 { };
 
+    rtl8723bs = callPackage ../os-specific/linux/rtl8723bs { };
+
     rtl8812au = callPackage ../os-specific/linux/rtl8812au { };
 
     openafsClient = callPackage ../servers/openafs-client { };