-- The C compiler identification is unknown
CMake Error at CMakeLists.txt:4 (project):
  The CMAKE_C_COMPILER:

    /home/t420/.guix-home/profile/bin/cc

  is not a full path to an existing compiler t-- The C compiler ident>
CMake Error at CMakeLists.txt:4 (project):
  The CMAKE_C_COMPILER:

    /home/t420/.guix-home/profile/bin/cc

  is not a full path to an existing compiler tool.

  Tell CMake where to find the compiler by setting either the environ>
  variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full>
  the compiler, or to the compiler name if it is in the PATH.


-- Configuring incomplete, errors occurred!