diff --git a/CMakeLists.txt b/CMakeLists.txt
index b582d3c..56a85b2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,12 +37,15 @@ target_link_libraries(${CMAKE_PROJECT_NAME}
 install(TARGETS ${CMAKE_PROJECT_NAME} DESTINATION ${CMAKE_INSTALL_BINDIR})
 install(FILES README.md DESTINATION ${CMAKE_INSTALL_DOCDIR})
 
-add_custom_command(OUTPUT "${PROJECT_BINARY_DIR}/${CMAKE_PROJECT_NAME}.1"
-                   WORKING_DIRECTORY "${PROJECT_BINARY_DIR}"
-                   DEPENDS "${CMAKE_SOURCE_DIR}/${CMAKE_PROJECT_NAME}.1.adoc"
-                   COMMAND ${CMAKE_SOURCE_DIR}/build_manpage.sh
-                   ARGS ${PROJECT_VERSION})
-add_custom_target(run ALL
-                  DEPENDS "${PROJECT_BINARY_DIR}/${CMAKE_PROJECT_NAME}.1")
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_PROJECT_NAME}.1
-        DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
+set(WITH_MAN "YES" CACHE STRING "WITH_MAN defaults to \"YES\"")
+if (WITH_MANPAGE)
+    add_custom_command(OUTPUT "${PROJECT_BINARY_DIR}/${CMAKE_PROJECT_NAME}.1"
+                       WORKING_DIRECTORY "${PROJECT_BINARY_DIR}"
+                       DEPENDS "${CMAKE_SOURCE_DIR}/${CMAKE_PROJECT_NAME}.1.adoc"
+                       COMMAND ${CMAKE_SOURCE_DIR}/build_manpage.sh
+                       ARGS ${PROJECT_VERSION})
+    add_custom_target(run ALL
+                      DEPENDS "${PROJECT_BINARY_DIR}/${CMAKE_PROJECT_NAME}.1")
+    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_PROJECT_NAME}.1
+            DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
+endif()
diff --git a/README.md b/README.md
index 428dd0c..68abcab 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,8 @@ Gentoo ebuilds are available via my
 * [cmake](https://cmake.org/) (at least 3.2)
 * [libxdg-basedir](http://repo.or.cz/w/libxdg-basedir.git) (tested: 1.2)
 * [libconfig++](https://github.com/hyperrealm/libconfig) (tested: 1.5)
+* Optional:
+    * Manpage: [asciidoc](http://asciidoc.org/) (tested: 8.6)
 
 #### Get sourcecode
 
@@ -47,6 +49,10 @@ make
 make install
 ```
 
+cmake options:
+* `-DCMAKE_BUILD_TYPE=Debug` for a debug build
+* `-DWITH_MAN=NO` to not compile the manpage
+
 ## Contributing
 
 Contributions are always welcome. You can submit them as pull requests or via