nvidia-x11: 375.20 -> 375.26

pkgs/os-specific/linux/nvidia-x11/default.nix

···
 
 let
 
-  versionNumber = "375.20";
+  versionNumber = "375.26";
 
   # Policy: use the highest stable version as the default (on our master).
   inherit (stdenv.lib) makeLibraryPath;
···
     if stdenv.system == "i686-linux" then
       fetchurl {
         url = "http://download.nvidia.com/XFree86/Linux-x86/${versionNumber}/NVIDIA-Linux-x86-${versionNumber}.run";
-        sha256 = "0da3mgfmkhs576wfkdmk8pbmvsksalkwz8a75vnhk0385fnd6yfc";
+        sha256 = "0yv19rkz2wzzj0fygfjb1mh21iy769kff3yg2kzk8bsiwnmcyybw";
       }
     else if stdenv.system == "x86_64-linux" then
       fetchurl {
         url = "http://download.nvidia.com/XFree86/Linux-x86_64/${versionNumber}/NVIDIA-Linux-x86_64-${versionNumber}.run";
-        sha256 = "02v20xns8w4flpllibc684g5yghi5dy28avsarccjyn5knhl03ni";
+        sha256 = "1kqy9ayja3g5znj2hzx8pklz8qi0b0l9da7c3ldg3hlxf31v4hjg";
       }
     else throw "nvidia-x11 does not support platform ${stdenv.system}";