@BenWiederhake
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In README.md, it says:

#### Optional
 * Vala Compiler (vapigen) (for Vala VAPI file)
 * libyaml (for DEP-11 support)

However, cd build && cmake .. doesn't work without yaml-dev in place:

-- Checking for module 'yaml-0.1'
--   Package 'yaml-0.1' not found
CMake Error at /usr/share/cmake-3.4/Modules/FindPkgConfig.cmake:360 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/share/cmake-3.4/Modules/FindPkgConfig.cmake:522 (_pkg_check_modules_internal)
  src/CMakeLists.txt:86 (pkg_check_modules)

I can see two ways to resolve this:

  • Make it a required dependency
  • Let it stay an optional dependency, and extend the line by something like Run cmake --no-yaml to build without this.