diff -up iso2mesh-1.9.6/tools/cgalmesh/CMakeLists.txt~ iso2mesh-1.9.6/tools/cgalmesh/CMakeLists.txt
--- iso2mesh-1.9.6/tools/cgalmesh/CMakeLists.txt~	2021-07-20 11:24:07.950132510 +0200
+++ iso2mesh-1.9.6/tools/cgalmesh/CMakeLists.txt	2021-07-20 11:25:30.913983853 +0200
@@ -47,7 +47,7 @@ if ( CGAL_FOUND )
   endif()
 
 
-  if ( Boost_FOUND AND Boost_VERSION GREATER 103400 )
+  if ( Boost_FOUND )
     include( CGAL_CreateSingleSourceCGALProgram )
 
     # Compilable examples