I can't add the background images from the NixOS day-night version to fedora 41

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1

I transferred the background images from NixOS gnome to usr/share/backgrounds/gnome/ . I created a NixOS.xml file. I can’t add it to gnome settings → appearance -->. The photos can be added separately. But not as a pair (night photo + day photo together). The xml file doesn’t work either.
google drive link for nixos backgrounds photos and nixos.xml file

NixOS.xml content:

<background>
  <starttime>
    <year>2024</year>
    <month>10</month>
    <day>22</day>
    <hour>8</hour>
    <minute>00</minute>
    <second>00</second>
  </starttime>
<!-- This animation will start at 8 AM. -->

<wallpapers>
  <wallpaper>
    <name>My NixOS Dynamic Wallpaper</name>
    <filename>/usr/share/backgrounds/gnome/nixos.xml</filename>
    <options>zoom</options>
  </wallpaper>
</wallpapers>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/adwaita-l-1.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/adwaita-l-1.jxl</from>
<to>/usr/share/backgrounds/gnome/adwaita-d-1.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/amber-l.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/amber-l.jxl</from>
<to>/usr/share/backgrounds/gnome/amber-d.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/blobs-l-1.svg</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/blobs-l-1.svg</from>
<to>/usr/share/backgrounds/gnome/blobs-d-1.svg</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/drool-l-1.svg</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/drool-l-1.svg</from>
<to>/usr/share/backgrounds/gnome/drool-d-1.svg</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/fold-l.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/fold-l.jxl</from>
<to>/usr/share/backgrounds/gnome/fold-d.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/geometrics-l.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/geometrics-l.jxl</from>
<to>/usr/share/backgrounds/gnome/geometrics-d.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/glass-chip-l.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/glass-chip-l.jxl</from>
<to>/usr/share/backgrounds/gnome/glass-chip-d.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/morphogenesis-l.svg</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/morphogenesis-l.svg</from>
<to>/usr/share/backgrounds/gnome/morphogenesis-d.svg</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/neogeo-l.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/neogeo-l.jxl</from>
<to>/usr/share/backgrounds/gnome/neogeo-d.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/pills-l-1.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/pills-l-1.jxl</from>
<to>/usr/share/backgrounds/gnome/pills-d-1.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/pixels-l.jpg</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/pixels-l.jpg</from>
<to>/usr/share/backgrounds/gnome/pixels-d.jpg</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/ring-l.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/ring-l.jxl</from>
<to>/usr/share/backgrounds/gnome/ring-d.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/symbolic-l.png</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/symbolic-l.png</from>
<to>/usr/share/backgrounds/gnome/symbolic-d.png</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/tarka-l.jxl</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/tarka-l.jxl</from>
<to>/usr/share/backgrounds/gnome/tarka-d.jxl</to>
</transition>

<!-- We start with day at 8 AM. It will remain up for 10 hours. -->
<static>
<duration>36000.0</duration>
<file>/usr/share/backgrounds/gnome/vnc-l.png</file>
</static>

<!-- Day ended and starts to transition to night at 6 PM. The transition lasts for 2 hours, ending at 8 PM. -->
<transition type="overlay">
<duration>7200.0</duration>
<from>/usr/share/backgrounds/gnome/vnc-l.png</from>
<to>/usr/share/backgrounds/gnome/vnc-d.png</to>
</transition>


</background>

Some conflicting photos have been renamed by adding “-1”. The overlapping photos in the attached photos should also be renamed in this way.

2

Does this work?

gsettings set 'org.gnome.desktop.background' 'picture-uri' '/usr/share/backgrounds/gnome/nixos.xml'
1 Like
3

Unfortunately, it didn’t work. Did I make a mistake in the code in the nixos.xml file?

4

There’s a GUI libadwaita app that can make those dynamic wallpaper XMLs but I can’t remember what it’s called.

1 Like