--- a/doc/CMakeLists.txt	2015-03-29 17:04:01.000000000 +0200
+++ b/doc/CMakeLists.txt	2021-02-27 22:56:13.025989166 +0100
@@ -1,8 +1,3 @@
 
 INSTALL(FILES de/anleitung.html en/manual.html  DESTINATION ${DOCDIR})
-
-add_custom_target(manpages ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/ballerburg.6.gz)
-add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/ballerburg.6.gz
-	COMMAND gzip -c -9 ${CMAKE_CURRENT_SOURCE_DIR}/ballerburg.6 > ${CMAKE_CURRENT_BINARY_DIR}/ballerburg.6.gz
-	DEPENDS ballerburg.6)
-INSTALL(FILES  ${CMAKE_CURRENT_BINARY_DIR}/ballerburg.6.gz DESTINATION ${MANDIR})
+INSTALL(FILES ballerburg.6 DESTINATION ${MANDIR})