--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -210,15 +210,6 @@ IF(UNIX)
       )
     EXEC_PROGRAM(${MY_UNAME} ARGS -r OUTPUT_VARIABLE MY_HOST_SYSTEM_VERSION)
   ENDIF()
-  FIND_PROGRAM(MY_DPKG_BUILDFLAGS dpkg-buildflags /bin /usr/bin)
-  FIND_PROGRAM(MY_RPM rpm /bin /usr/bin)
-  IF(MY_RPM)
-    EXECUTE_PROCESS(COMMAND ${MY_RPM} -qf /
-      OUTPUT_VARIABLE MY_HOST_FILESYSTEM_NAME
-      OUTPUT_STRIP_TRAILING_WHITESPACE
-      RESULT_VARIABLE MY_RPM_RESULT
-      )
-  ENDIF()
 ENDIF()
 
 # See comments above, about CMAKE_MINIMUM_REQUIRED VERSION and macOS 11.