diff --git a/README.md b/README.md
index 1afc6db1..ec553960 100644
--- a/README.md
+++ b/README.md
@@ -1034,6 +1034,13 @@ If ops configuration already exists, `OPS_FILE` will not be retrieved and any us
 
 > Similar to whitelists, you can provide both `OPS_FILE` and `OPS`, and Minecraft 1.7.5 or earlier will use `ops.txt` rather than `ops.json`.
 
+### Enable/disable initial selection of datapacks
+
+New to [22W42A](https://www.minecraft.net/en-us/article/minecraft-snapshot-22w42a), datapacks with feature flags can be controlled before initial world creation by setting these to a comma separated list of packs:
+
+- `INITIAL_ENABLED_PACKS`
+- `INITIAL_DISABLED_PACKS`
+
 ### Server icon
 
 A server icon can be configured using the `ICON` variable. The image will be automatically
diff --git a/scripts/start-setupServerProperties b/scripts/start-setupServerProperties
index 9e331077..673179ce 100755
--- a/scripts/start-setupServerProperties
+++ b/scripts/start-setupServerProperties
@@ -108,6 +108,8 @@ function customizeServerProps {
   setServerProp "simulation-distance" SIMULATION_DISTANCE
   setServerProp "previews-chat" PREVIEWS_CHAT
   setServerProp "enforce-secure-profile" ENFORCE_SECURE_PROFILE
+  setServerProp "initial-enabled-packs" INITIAL_ENABLED_PACKS
+  setServerProp "initial-disabled-packs" INITIAL_DISABLED_PACKS
   if [[ $MOTD ]]; then
     setServerPropValue "motd" "$(echo "$MOTD" | mc-image-helper asciify)"
   fi