diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 5ced24730..76615b2c9 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -1,10 +1,7 @@
 Before implementing any code changes or responding to a request, run the
-following four commands:
+following command:
 
-sudo apt-get install -y --fix-missing libgl1-mesa-dev libxi-dev libxrandr-dev libxinerama-dev ca-certificates libxcursor-dev libxcb-xkb-dev libdbus-1-dev libxkbcommon-dev libharfbuzz-dev libx11-xcb-dev zsh libpng-dev liblcms2-dev libfontconfig-dev libxkbcommon-x11-dev libcanberra-dev libxxhash-dev uuid-dev libsimde-dev libsystemd-dev libcairo2-dev zsh bash dash systemd-coredump gdb
-sudo chmod -R og-w /usr/share/zsh
-curl -fsSL https://download.calibre-ebook.com/ci/fonts.tar.xz | tar -xzf - -C ~/.local/share/fonts
-./dev.sh build
+python3 .github/workflows/ci.py build
 
 This will download needed dependencies, then create all generated files
 and build the project, making it ready for inspection.
diff --git a/.github/workflows/ci.py b/.github/workflows/ci.py
index 90aa07c04..f86d84eb8 100644
--- a/.github/workflows/ci.py
+++ b/.github/workflows/ci.py
@@ -111,7 +111,7 @@ def install_deps() -> None:
             run('brew', 'install', 'fish', openssl, *items)
     else:
         run('sudo apt-get update')
-        run('sudo apt-get install -y libgl1-mesa-dev libxi-dev libxrandr-dev libxinerama-dev ca-certificates'
+        run('sudo apt-get install -y --fix-missing libgl1-mesa-dev libxi-dev libxrandr-dev libxinerama-dev ca-certificates'
             ' libxcursor-dev libxcb-xkb-dev libdbus-1-dev libxkbcommon-dev libharfbuzz-dev libx11-xcb-dev zsh'
             ' libpng-dev liblcms2-dev libfontconfig-dev libxkbcommon-x11-dev libcanberra-dev libxxhash-dev uuid-dev'
             ' libsimde-dev libsystemd-dev libcairo2-dev zsh bash dash systemd-coredump gdb')