Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -84,6 +84,10 @@ if ("${CMAKE_SYSTEM_NAME}" MATCHES "FreeBSD")
     set(_OS_FREEBSD_ 1)
 endif ()
 
+if ("${CMAKE_SYSTEM_NAME}" MATCHES "OpenBSD")
+    set(_OS_OPENBSD_ 1)
+endif ()
+
 if ("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
     set(_OS_DARWIN_ 1)
     add_definitions(-DMACOSX)
@@ -171,7 +175,7 @@ else ()
     add_definitions(-DRELEASE)
     # Use CMAKE_INSTALL_PREFIX as storage of data,gfx, etc.. Useful only on *nix OS.
     if(USE_PREFIX_DATA_DIR)
-        if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Linux|FreeBSD|Darwin)")
+        if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Linux|FreeBSD|Darwin|OpenBSD)")
             set(CMAKE_INSTALL_DATAROOTDIR "${CMAKE_INSTALL_PREFIX}/share/cataclysm-dda")
             add_definitions(-DPREFIX=${CMAKE_INSTALL_PREFIX})
             configure_file(
@@ -401,7 +405,7 @@ if (CATA_CLANG_TIDY_PLUGIN OR CATA_CLANG_TIDY_EXECUTAB
     add_subdirectory(tools/clang-tidy-plugin)
 endif()
 
-install(DIRECTORY doc TYPE DOC)
+#install(DIRECTORY doc TYPE DOC)
 
 if (RELEASE)
     install(FILES
