diff --git a/Dockerfile b/Dockerfile
index c85714e9..a0f91e68 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,11 +7,13 @@ RUN apt-get update && \
         build-essential \
         libcapstone-dev \
         pkgconf \
-        python3
+        python3 \
+        libz-dev
 
 RUN mkdir /sm64
 WORKDIR /sm64
 ENV PATH="/sm64/tools:${PATH}"
 
-CMD echo 'usage: docker run --rm --mount type=bind,source="$(pwd)",destination=/sm64 sm64ex-coop make -j4 HEADLESS=1\n' \
-         'see https://github.com/n64decomp/sm64/blob/master/README.md for advanced usage'
+# docker build -t sm64ex-coop .
+# docker run --rm --mount type=bind,source="$(pwd)",destination=/sm64 sm64ex-coop make -j HEADLESS=1 
+# see https://github.com/n64decomp/sm64/blob/master/README.md for advanced usage
diff --git a/src/game/mario_actions_airborne.c b/src/game/mario_actions_airborne.c
index bf1bafc6..b0fb1610 100644
--- a/src/game/mario_actions_airborne.c
+++ b/src/game/mario_actions_airborne.c
@@ -53,7 +53,7 @@ void play_knockback_sound(struct MarioState *m) {
 #endif
 
 s32 lava_boost_on_wall(struct MarioState *m) {
-    if (Cheats.enabled && Cheats.godMode) { return; }
+    if (Cheats.enabled && Cheats.godMode) { return FALSE; }
     m->faceAngle[1] = atan2s(m->wallNormal[2], m->wallNormal[0]);
 
     if (m->forwardVel < 24.0f) {