vivaldi: add missing build/install phase hooks

pkgs/applications/networking/browsers/vivaldi/default.nix

@@ -47,6 +47,7 @@ in stdenv.mkDerivation rec {
     + ":$out/opt/${vivaldiName}/lib";
 
   buildPhase = ''
+    runHook preBuild
     echo "Patching Vivaldi binaries"
     patchelf \
       --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
@@ -56,12 +57,14 @@ in stdenv.mkDerivation rec {
     ln -s ${vivaldi-ffmpeg-codecs}/lib/libffmpeg.so opt/${vivaldiName}/libffmpeg.so.''${version%\.*\.*}
   '' + ''
     echo "Finished patching Vivaldi binaries"
+    runHook postBuild
   '';
 
   dontPatchELF = true;
   dontStrip    = true;
 
   installPhase = ''
+    runHook preInstall
     mkdir -p "$out"
     cp -r opt "$out"
     mkdir "$out/bin"
@@ -84,6 +87,8 @@ in stdenv.mkDerivation rec {
       ${lib.optionalString enableWidevine "--suffix LD_LIBRARY_PATH : ${libPath}"}
   '' + lib.optionalString enableWidevine ''
     ln -sf ${vivaldi-widevine}/share/google/chrome/WidevineCdm $out/opt/${vivaldiName}/WidevineCdm
+  '' + ''
+    runHook postInstall
   '';
 
   meta = with lib; {