diff --git a/CMakeLists.txt b/CMakeLists.txt
index b92b5473b2..9c3c20d23f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -115,12 +115,12 @@ set_property(CACHE CMAKE_BUILD_TYPE PROPERTY
 set(NVIM_VERSION_MAJOR 0)
 set(NVIM_VERSION_MINOR 4)
 set(NVIM_VERSION_PATCH 0)
-set(NVIM_VERSION_PRERELEASE "-dev") # for package maintainers
+set(NVIM_VERSION_PRERELEASE "") # for package maintainers
 
 # API level
 set(NVIM_API_LEVEL 6)         # Bump this after any API change.
 set(NVIM_API_LEVEL_COMPAT 0)  # Adjust this after a _breaking_ API change.
-set(NVIM_API_PRERELEASE true)
+set(NVIM_API_PRERELEASE false)
 
 file(TO_CMAKE_PATH ${CMAKE_CURRENT_LIST_DIR}/.git FORCED_GIT_DIR)
 include(GetGitRevisionDescription)
diff --git a/test/functional/fixtures/api_level_6.mpack b/test/functional/fixtures/api_level_6.mpack
new file mode 100644
index 0000000000..b348f86beb
Binary files /dev/null and b/test/functional/fixtures/api_level_6.mpack differ