diff --git a/Installation/CMakeLists.txt b/Installation/CMakeLists.txt
index 1e912131c12..fa2102ff7c0 100644
--- a/Installation/CMakeLists.txt
+++ b/Installation/CMakeLists.txt
@@ -592,10 +592,9 @@ set(CGAL_INSTALL_LIB_DIR
 )
 
 if(CGAL_WIN32_CMAKE_ON_CYGWIN)
-  exec_program(
-    cygpath ARGS
-    -w "${CMAKE_INSTALL_PREFIX}"
-    OUTPUT_VARIABLE CMAKE_INSTALL_PREFIX2)
+  execute_process(COMMAND cygpath -w ${CMAKE_INSTALL_PREFIX}
+                  OUTPUT_STRIP_TRAILING_WHITESPACE
+                  OUTPUT_VARIABLE CMAKE_INSTALL_PREFIX2)
   file(TO_CMAKE_PATH ${CMAKE_INSTALL_PREFIX2} CMAKE_INSTALL_PREFIX)
 endif()
 
diff --git a/Installation/cmake/modules/CGAL_Common.cmake b/Installation/cmake/modules/CGAL_Common.cmake
index ce99da6489e..df6446c92ae 100644
--- a/Installation/cmake/modules/CGAL_Common.cmake
+++ b/Installation/cmake/modules/CGAL_Common.cmake
@@ -20,7 +20,9 @@ if( NOT CGAL_COMMON_FILE_INCLUDED )
   if ( WIN32 )
     find_program(CMAKE_UNAME uname /bin /usr/bin /usr/local/bin )
     if(CMAKE_UNAME)
-      exec_program(uname ARGS -s OUTPUT_VARIABLE CMAKE_SYSTEM_NAME2)
+      execute_process(COMMAND uname -s
+                      OUTPUT_STRIP_TRAILING_WHITESPACE
+                      OUTPUT_VARIABLE CMAKE_SYSTEM_NAME2)
       if ( CMAKE_SYSTEM_NAME2 MATCHES "CYGWIN" )
         message( STATUS "This is the Windows CMake running within the cygwin platform." )
         set( CGAL_WIN32_CMAKE_ON_CYGWIN TRUE CACHE INTERNAL "This is the cygwin platform." )
diff --git a/Installation/cmake/modules/CGAL_GeneratorSpecificSettings.cmake b/Installation/cmake/modules/CGAL_GeneratorSpecificSettings.cmake
index 70dc4de3e56..3b62159e5e0 100644
--- a/Installation/cmake/modules/CGAL_GeneratorSpecificSettings.cmake
+++ b/Installation/cmake/modules/CGAL_GeneratorSpecificSettings.cmake
@@ -39,7 +39,9 @@ if ( NOT CGAL_GENERATOR_SPECIFIC_SETTINGS_FILE_INCLUDED )
 
   # From james Bigler, in the cmake users list.
   IF (APPLE)
-    exec_program(uname ARGS -v  OUTPUT_VARIABLE DARWIN_VERSION)
+    execute_process(COMMAND uname -v
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+                    OUTPUT_VARIABLE DARWIN_VERSION)
     string(REGEX MATCH "[0-9]+" DARWIN_VERSION ${DARWIN_VERSION})
     message(STATUS "Running in macOS DARWIN_VERSION=${DARWIN_VERSION}")
   endif()
diff --git a/cmake_uninstall.cmake.in b/cmake_uninstall.cmake.in
index d00a5166581..62bd37f80fd 100644
--- a/cmake_uninstall.cmake.in
+++ b/cmake_uninstall.cmake.in
@@ -12,10 +12,11 @@ string(REGEX REPLACE "\n" ";" files "${files}")
 foreach(file ${files})
   message(STATUS "Uninstalling $ENV{DESTDIR}${file}")
   if(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
-    exec_program(
-      "@CMAKE_COMMAND@" ARGS "-E remove \"$ENV{DESTDIR}${file}\""
+    execute_process(
+      COMMAND "@CMAKE_COMMAND@" -E remove "$ENV{DESTDIR}${file}"
+      OUTPUT_STRIP_TRAILING_WHITESPACE
       OUTPUT_VARIABLE rm_out
-      RETURN_VALUE rm_retval
+      RESULT_VARIABLE rm_retval
       )
     if(NOT "${rm_retval}" STREQUAL 0)
       message(FATAL_ERROR "Problem when removing $ENV{DESTDIR}${file}")