Some 8 cmake patches were necessary to get libalkimia detection right.
This just copies the current state of 4.8 branch.

--- a/CMakeLists.txt	2016-10-26 12:17:23.390317411 +0200
+++ b/CMakeLists.txt	2016-10-26 12:17:53.750544101 +0200
@@ -110,14 +110,21 @@
   add_custom_target(apidoc ${DOXYGEN} ${CMAKE_CURRENT_BINARY_DIR}/kmymoney.doxygen)
 endif(DOXYGEN_FOUND)
 
-find_package(LibAlkimia 4.3.2 REQUIRED)
+find_package(LibAlkimia REQUIRED)
 #TODO: remove when LibAlkimia minimum version will be raised
 if (NOT LIBALKIMIA_LIBRARIES AND LIBALKIMIA_LIBRARY)
   # LibAlkimia 4.3.2 does not properly define LIBALKIMIA_LIBRARIES
   find_package(GMP REQUIRED)
   set(LIBALKIMIA_LIBRARIES ${GMP_LIBRARIES} ${LIBALKIMIA_LIBRARY} )
 endif()
-
+# make sure we have the matching version of LibAlkimia (not too new)
+if(${LibAlkimia_FOUND})
+    if (DEFINED ${LibAlkimia_VERSION})
+        if (NOT "${LibAlkimia_VERSION}" VERSION_LESS "6.0.0")
+            message(FATAL_ERROR "This version of KMyMoney requires LibAlkimia < 6.0.0 and does not work with the installed version of LibAlkimia")
+        endif()
+    endif()
+endif()
 # check for PkgConfig
 find_package(PkgConfig)