mediainfo: enable parallel building

pkgs/applications/misc/mediainfo-gui/default.nix

@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
 
   sourceRoot = "./MediaInfo/Project/GNU/GUI/";
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     description = "Supplies technical and tag information about a video or audio file (GUI version)";
     longDescription = ''

pkgs/applications/misc/mediainfo/default.nix

@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
 
   configureFlags = [ "--with-libmediainfo=${libmediainfo}" ];
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     description = "Supplies technical and tag information about a video or audio file";
     longDescription = ''

pkgs/development/libraries/libmediainfo/default.nix

@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
 
   configureFlags = [ "--enable-shared" ];
 
+  enableParallelBuilding = true;
+
   postInstall = ''
     install -vD -m 644 libmediainfo.pc "$out/lib/pkgconfig/libmediainfo.pc"
   '';

pkgs/development/libraries/libzen/default.nix

@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
 
   preConfigure = "sh autogen.sh";
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     description = "Shared library for libmediainfo and mediainfo";
     homepage = https://mediaarea.net/;