llbuild cannot build cmake projects ('|' operator not supported)

[theoparis]

cmake version: 3.25.3
llbuild version: 5.2

It seems like llbuild cannot build cmake ninja manifests that utilize the | operator 👀

Error:

/home/theo/dev/dyadikos/build/_deps/vulkan-headers-subbuild/build.ninja:151:102: error: expected ':' token
  build vulkan-headers-populate-prefix/src/vulkan-headers-populate-stamp/vulkan-headers-populate-update | ${cmake_ninja_workdir}vulkan-headers-populate-prefix/src/vulkan-headers-populate-stamp/vulkan-headers-populate-update: CUSTOM_COMMAND vulkan-headers-populate-prefix/src/vulkan-headers-populate-stamp/vulkan-headers-populate-download

According to https://ninja-build.org/manual.html, it seems like it is implicit dependency syntax.

Implicit dependencies, either as picked up from a depfile attribute on a rule or from the syntax | dep1 dep2 on the end of a build line. The semantics are identical to explicit dependencies, the only difference is that implicit dependencies don’t show up in the $in variable.