Add path to a guix package into CMakeLists.txt

[Aristide Doussot]

Hello,

    I am new with Guix and currently Guixifying an astronomical library 
(called Wsclean) which directly includes some code from another library 
(namely aocommon) that is already on guix astronomy.scm. In the 
CMakeLists.txt of the library I am trying to install, I want to change 
the line:

"include_directories(${CMAKE_SOURCE_DIR}/external/aocommon/include/)"

into the already installed guix version of aocommon, in my case it would 
be :

"include_directories(/gnu/store/1wiw8m5yjcr26pcqhzbh7bw5ghvbaw90-aocommon-0.0.0-1.7329a07/include/)"

However I don't think other users installing the package would 
mandatorily have 
"/gnu/store/1wiw8m5yjcr26pcqhzbh7bw5ghvbaw90-aocommon-0.0.0-1.7329a07" 
as their path to their installed guix version of aocommon. My question 
is therefore : is there a way to ask guix to find this path based on the 
name of the dependency and use it in my substitute* command on the 
CMakeLists file ?

Thanks,
Aristide Doussot