oh, while i'm here maybe someone can take a look at my attempts to update the weather dconf settings (and why they aren't working...)

  #  "org/gnome/clocks".world-clocks = [ {
  #    location = mkVariant [ (mkUint32 2) (mkVariant [ "Seattle" "KBFI" true [ (mkTuple [ 0.8298313314533731 (-2.134775231953554) ]) ] [ (mkTuple [ 0.8308850914425572 (-2.135097419733472) ]) ] ]) ];
  #  } {
  #    location = mkVariant [ (mkUint32 2) (mkVariant [ "New York" "KNYC" true [ (mkTuple [ 0.7118034407872564 (-1.2909618758762367) ]) ] [ (mkTuple [ 0.7105980465926592 (-1.2916478949920254) ]) ] ]) ];
  #  } {
  #    location = mkVariant [ (mkUint32 2) (mkVariant [ "Berlin" "EDDT" true [ (mkTuple [ 0.9174614159494501 0.23241968454167572 ]) ] [ (mkTuple [ 0.916588751323453 0.23387411976724018 ]) ] ]) ];
  #  } {
  #    location = mkVariant [ (mkUint32 2) (mkVariant [ "Shanghai" "ZSSS" true [ (mkTuple [ 0.5439609560226636 2.1194114825206833 ]) ] [ (mkTuple [ 0.544930573688609 2.119842980271654 ]) ] ]) ];
  #  } ];
  #  "org/gnome/clocks" = {
  #      world-clocks = [ {
  #        location = mkVariant [ (mkUint32 2) (mkVariant [ "Seattle" "KBFI" true [ (mkTuple [ 0.8298313314533731 (-2.134775231953554) ]) ] [ (mkTuple [ 0.8308850914425572 (-2.135097419733472) ]) ] ]) ];
  #      } {
  #        location = mkVariant [ (mkUint32 2) (mkVariant [ "New York" "KNYC" true [ (mkTuple [ 0.7118034407872564 (-1.2909618758762367) ]) ] [ (mkTuple [ 0.7105980465926592 (-1.2916478949920254) ]) ] ]) ];
  #      } {
  #        location = mkVariant [ (mkUint32 2) (mkVariant [ "Berlin" "EDDT" true [ (mkTuple [ 0.9174614159494501 0.23241968454167572 ]) ] [ (mkTuple [ 0.916588751323453 0.23387411976724018 ]) ] ]) ];
  #      } {
  #        location = mkVariant [ (mkUint32 2) (mkVariant [ "Shanghai" "ZSSS" true [ (mkTuple [ 0.5439609560226636 2.1194114825206833 ]) ] [ (mkTuple [ 0.544930573688609 2.119842980271654 ]) ] ]) ];
  #      } ];
  #    };
  #  "org/gnome/shell/world-clocks".locations = [ (mkVariant [ (mkUint32 2) (mkVariant [ "Seattle" "KBFI" true [ (mkTuple [ 0.8298313314533731 (-2.134775231953554) ]) ] [ (mkTuple [ 0.8308850914425572 (-2.135097419733472) ]) ] ]) ]) (mkVariant [ (mkUint32 2) (mkVariant [ "New York" "KNYC" true [ (mkTuple [ 0.7118034407872564 (-1.2909618758762367) ]) ] [ (mkTuple [ 0.7105980465926592 (-1.2916478949920254) ]) ] ]) ]) (mkVariant [ (mkUint32 2) (mkVariant [ "Berlin" "EDDT" true [ (mkTuple [ 0.9174614159494501 0.23241968454167572 ]) ] [ (mkTuple [ 0.916588751323453 0.23387411976724018 ]) ] ]) ]) (mkVariant [ (mkUint32 2) (mkVariant [ "Shanghai" "ZSSS" true [ (mkTuple [ 0.5439609560226636 2.1194114825206833 ]) ] [ (mkTuple [ 0.544930573688609 2.119842980271654 ]) ] ]) ]) ];

    ## Weather
  #  "org/gnome/Weather".locations = [ (mkVariant [ (mkUint32 2) (mkVariant [ "Seattle" "KBFI" true [ (mkTuple [ 0.8298313314533731 (-2.134775231953554) ]) ] [ (mkTuple [ 0.8308850914425572 (-2.135097419733472) ]) ] ]) ]) ];
  #  "org/gnome/shell/weather".locations = [ (mkVariant [ (mkUint32 2) (mkVariant [ "Seattle" "KBFI" true [ (mkTuple [ 0.8298313314533731 (-2.134775231953554) ]) ] [ (mkTuple [ 0.8308850914425572 (-2.135097419733472) ]) ] ]) ]) ];

In reply to @mcnesium:exma.de
could you rephrase that answer to also answer my question regarding how to do it or rather how it is done? I am curious whether I can contribute somehow to make it happen

just ran through the process but as there weren't new collisions, so I'm not exactly sure what those steps will look like. Here's the general steps (I know, I know, oversimplified):

git clone --depth 1 git@github.com:NixOS/nixpkgs.git
cd nixpkgs/pkgs/desktops/gnome/extensions
git switch -c gnome-extensions
./update-extensions.py
git status (to check if there were new collisions)
cd ../../../../
nix-build -A nixosTests.gnome-extensions
git add pkgs/desktops/gnome/extensions/
git commit -m "gnomeExtensions: auto-update"

while these steps use the main repo, generally they should be followed on your own fork which, after the changes are pushed, can be used to open a Pull Request

   StandardError=

       Controls where file descriptor 2 (stderr) of the executed processes is connected to. The available options are identical to those of StandardOutput=, with some exceptions: if set to inherit the file descriptor used for standard output is duplicated for standard error, while fd:name will use a default file descriptor name of "stderr".

StandardError=

   Controls where file descriptor 2 (stderr) of the executed processes is connected to. The available options are identical to those of StandardOutput=, with some exceptions: if set to inherit the file descriptor used for standard output is duplicated for standard error, while fd:name will use a default file descriptor name of "stderr".

StandardError=

Controls where file descriptor 2 (stderr) of the executed processes is connected to. The available options are identical to those of StandardOutput=, with some exceptions: if set to inherit the file descriptor used for standard output is duplicated for standard error, while fd:name will use a default file descriptor name of "stderr".