Hi Raghav,

I tried

    (arguments
     `(#:configure-flags
       (list "-DENABLE_DBUS=YES"
             "-DENABLE_UPDATE_CHECK=YES")
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'patch
           (lambda _
             (substitute* "CMakeLists.txt"
              (("find_package[(]BcToolbox REQUIRED[)]")
               "find_package(bctoolbox REQUIRED)")
              (("find_package[(]Belcard REQUIRED[)]")
               "find_package(belcard REQUIRED)"))
             #t)))))

in linphone-desktop's package description and the error message changed.