diff --git a/PyIlmBase/CMakeLists.txt b/PyIlmBase/CMakeLists.txt
index eee43ebaff..f4748f7a1b 100644
--- a/PyIlmBase/CMakeLists.txt
+++ b/PyIlmBase/CMakeLists.txt
@@ -44,11 +44,11 @@ endif()
 # now determine which (or both), and compile for both
 find_package(Python2 COMPONENTS Interpreter Development)
 find_package(Python3 COMPONENTS Interpreter Development)
-if(TARGET Python2::Python AND TARGET Python3::Python)
+if(Python2_FOUND AND Python3_FOUND)
   message(STATUS ": Found Python ${Python2_VERSION} and ${Python3_VERSION}")
-elseif(TARGET Python2::Python)
+elseif(Python2_FOUND)
   message(STATUS ": Found Python ${Python2_VERSION}")
-elseif(TARGET Python3::Python)
+elseif(Python3_FOUND)
   message(STATUS ": Found Python ${Python3_VERSION}")
 else()
   message(WARNING ": Unable to find python development libraries for python 2 or 3")
@@ -87,7 +87,7 @@ function(PYILMBASE_EXTRACT_REL_SITEARCH varname pyver pyexe pysitearch)
   message(STATUS "  -> Will install to: ${_reldir}")
 endfunction()
 
-if (TARGET Python2::Python)
+if(Python2_FOUND)
   set(PYILMBASE_BOOST_PY2_COMPONENT "python${Python2_VERSION_MAJOR}${Python2_VERSION_MINOR}")
   message(STATUS "Found Python2 libraries: ${Python2_VERSION_MAJOR}${Python2_VERSION_MINOR}")
   # we can't just use the Python2_SITEARCH variable as that then will
@@ -95,7 +95,7 @@ if (TARGET Python2::Python)
   # if it is generally useful
   pyilmbase_extract_rel_sitearch(PyIlmBase_Python2_SITEARCH_REL 2 ${Python2_EXECUTABLE} ${Python2_SITEARCH})
 endif()
-if (TARGET Python3::Python)
+if(Python3_FOUND)
   set(PYILMBASE_BOOST_PY3_COMPONENT "python${Python3_VERSION_MAJOR}${Python3_VERSION_MINOR}")
   message(STATUS "Found Python3 libraries: ${Python3_VERSION_MAJOR}${Python3_VERSION_MINOR}")
   # and figure out the install root here