I had some trouble building Tutanota on Debian. The steps described in Building.md are incomplete and need some extra specifications.

1. Install packages: sudo apt install linux-headers-$(uname -r) build-essential cmake git emscripten
2. Install Rust/Cargo: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh; . $HOME/.cargo/env
3. Install Node.js:

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.2/install.sh | bash
\. "$HOME/.nvm/nvm.sh"
nvm install 23
node -v # Should print "v23.10.0"
nvm current # Should print "v23.10.0"
npm -v # Should print "10.9.2"

4. Clone the repository: git clone https://github.com/tutao/tutanota.git
5. Change directory: cd tutanota
6. Get the latest release tag name: RELEASETAG=$(curl -s https://api.github.com/repos/tutao/tutanota/releases/latest | jq -r '.tag_name')
7. Checkout the release tag: git checkout $RELEASETAG
8. Update the sub modules:

git submodule init
git submodule sync --recursive
git submodule update
npm ci

9. Build:

npm run build-packages
node desktop --custom-desktop-release

10. Unpacked binary location: ./artifacts/desktop/linux-unpacked

I hope these changes get into the Building.md file or that somebody might benefit from this.