diff --git a/bin/compose b/bin/compose
index 253e246..382e391 100755
--- a/bin/compose
+++ b/bin/compose
@@ -398,7 +398,7 @@ get_compose_file_opt() {
 
 _get_compose_file_opt() {
     local hash_bin="$1" override="$2" \
-          cache_file="$COMPOSE_CACHE/$FUNCNAME.cache.$(p0 "$@" | md5_compat)"
+          cache_file="$COMPOSE_LAUNCHER_CACHE/$FUNCNAME.cache.$(p0 "$@" | md5_compat)"
     if [ -e "$cache_file" ]; then
         cat "$cache_file" &&
         touch "$cache_file" || return 1
@@ -455,7 +455,7 @@ replace_compose_file_opt() {
 
 _replace_compose_file_opt() {
     local hash_bin="$1" override="$2" \
-          cache_file="$COMPOSE_CACHE/$FUNCNAME.cache.$(p0 "$@" | md5_compat)"
+          cache_file="$COMPOSE_LAUNCHER_CACHE/$FUNCNAME.cache.$(p0 "$@" | md5_compat)"
     if [ -e "$cache_file" ]; then
         cat "$cache_file" &&
         touch "$cache_file" || return 1
@@ -499,7 +499,7 @@ _replace_compose_file_opt() {
 
 get_compose_opts_list() {
     local hash_bin="$1" override="$2" \
-          cache_file="$COMPOSE_CACHE/$FUNCNAME.cache.$1"
+          cache_file="$COMPOSE_LAUNCHER_CACHE/$FUNCNAME.cache.$1"
 
     if [ -e "$cache_file" ]; then
         cat "$cache_file" &&
@@ -540,7 +540,7 @@ single_opts_filter() {
 
 get_compose_multi_opts_list() {
     local hash_bin="$1" override="$2" \
-          cache_file="$COMPOSE_CACHE/$FUNCNAME.cache.$1"  opts_list
+          cache_file="$COMPOSE_LAUNCHER_CACHE/$FUNCNAME.cache.$1"  opts_list
     if [ -e "$cache_file" ]; then
         cat "$cache_file" &&
         touch "$cache_file" || return 1
@@ -554,7 +554,7 @@ get_compose_multi_opts_list() {
 
 get_compose_single_opts_list() {
     local hash_bin="$1" override="$2" \
-          cache_file="$COMPOSE_CACHE/$FUNCNAME.cache.$1"  opts_list
+          cache_file="$COMPOSE_LAUNCHER_CACHE/$FUNCNAME.cache.$1"  opts_list
     if [ -e "$cache_file" ]; then
         cat "$cache_file" &&
         touch "$cache_file" || return 1
@@ -566,7 +566,7 @@ get_compose_single_opts_list() {
 
 
 get_volume_opt() {
-    local cache_file="$COMPOSE_CACHE/$FUNCNAME.cache.$(p0 "$@" | md5_compat)"
+    local cache_file="$COMPOSE_LAUNCHER_CACHE/$FUNCNAME.cache.$(p0 "$@" | md5_compat)"
     if [ -e "$cache_file" ]; then
         cat "$cache_file" &&
         touch "$cache_file" || return 1
@@ -648,6 +648,46 @@ pretty_print() {
 }
 
 
+set_os() {
+    OS="$(get_os)"
+    case "$OS" in
+        linux)
+            COMPOSE_LOCAL_ROOT=${COMPOSE_LOCAL_ROOT:-"$HOME/.compose"}
+            COMPOSE_VAR=${COMPOSE_VAR:-/var/lib/compose}
+            COMPOSE_CACHE=${COMPOSE_CACHE:-/var/cache/compose}
+            DATASTORE=${DATASTORE:-/srv/datastore/data}
+            CONFIGSTORE=${CONFIGSTORE:-/srv/datastore/config}
+            if [ "$UID" == 0 ]; then
+                SESSION_DIR=${SESSION_DIR:-"$COMPOSE_VAR"/sessions}
+                CHARM_STORE=${CHARM_STORE:-/srv/charm-store}
+                TZ_PATH=${TZ_PATH:-"$COMPOSE_VAR"/timezones}
+                COMPOSE_LAUNCHER_CACHE=${COMPOSE_LAUNCHER_CACHE:-"$COMPOSE_CACHE"}
+            else
+                SESSION_DIR=${SESSION_DIR:-"$COMPOSE_LOCAL_ROOT"/sessions}
+                CHARM_STORE=${CHARM_STORE:-"$HOME"/.charm-store}
+                TZ_PATH=${TZ_PATH:-"$COMPOSE_LOCAL_ROOT"/timezones}
+                COMPOSE_LAUNCHER_CACHE=${COMPOSE_LAUNCHER_CACHE:-"$COMPOSE_LOCAL_ROOT"/cache}
+            fi
+            ;;
+        mac)
+            COMPOSE_LOCAL_ROOT=${COMPOSE_LOCAL_ROOT:-"$HOME/.compose"}
+            COMPOSE_VAR=${COMPOSE_VAR:-"$COMPOSE_LOCAL_ROOT"/lib}
+            COMPOSE_CACHE=${COMPOSE_CACHE:-"$COMPOSE_LOCAL_ROOT"/cache}
+            SESSION_DIR=${SESSION_DIR:-"$COMPOSE_LOCAL_ROOT"/sessions}
+            DATASTORE=${DATASTORE:-"$COMPOSE_LOCAL_ROOT"/data}
+            CONFIGSTORE=${CONFIGSTORE:-"$COMPOSE_LOCAL_ROOT"/config}
+            CHARM_STORE=${CHARM_STORE:-"$HOME"/.charm-store}
+            TZ_PATH=${TZ_PATH:-"$COMPOSE_LOCAL_ROOT"/timezones}
+            COMPOSE_LAUNCHER_CACHE=${COMPOSE_LAUNCHER_CACHE:-"$COMPOSE_LOCAL_ROOT"/cache}
+            ;;
+        *)
+            echo "System '$os' not supported yet." >&2
+            exit 1
+            ;;
+    esac
+}
+
+
 mk_docker_run_options() {
 
     ## Order matters, files get to override vars
@@ -667,8 +707,9 @@ mk_docker_run_options() {
         ~/.compose.conf
     )
 
-    docker_run_opts=("-v" "/var/run/docker.sock:/var/run/docker.sock")
+    set_os || return 1
 
+    docker_run_opts=("-v" "/var/run/docker.sock:/var/run/docker.sock")
 
     ##
     ## Load config files
@@ -687,40 +728,7 @@ mk_docker_run_options() {
     fi
 
 
-    COMPOSE_LOCAL_ROOT=${COMPOSE_LOCAL_ROOT:-"$HOME/.compose"}
-
-    case "$(get_os)" in
-        linux)
-            COMPOSE_VAR=${COMPOSE_VAR:-/var/lib/compose}
-            COMPOSE_CACHE=${COMPOSE_CACHE:-/var/cache/compose}
-            DATASTORE=${DATASTORE:-/srv/datastore/data}
-            CONFIGSTORE=${CONFIGSTORE:-/srv/datastore/config}
-            if [ "$UID" == 0 ]; then
-                SESSION_DIR=${SESSION_DIR:-"$COMPOSE_VAR"/sessions}
-                CHARM_STORE=${CHARM_STORE:-/srv/charm-store}
-                TZ_PATH=${TZ_PATH:-"$COMPOSE_VAR"/timezones}
-            else
-                SESSION_DIR=${SESSION_DIR:-"$COMPOSE_LOCAL_ROOT"/sessions}
-                CHARM_STORE=${CHARM_STORE:-"$HOME"/.charm-store}
-                TZ_PATH=${TZ_PATH:-"$COMPOSE_LOCAL_ROOT"/timezones}
-            fi
-            ;;
-        mac)
-            COMPOSE_VAR=${COMPOSE_VAR:-"$COMPOSE_LOCAL_ROOT"/lib}
-            COMPOSE_CACHE=${COMPOSE_CACHE:-"$COMPOSE_LOCAL_ROOT"/cache}
-            SESSION_DIR=${SESSION_DIR:-"$COMPOSE_LOCAL_ROOT"/sessions}
-            DATASTORE=${DATASTORE:-"$COMPOSE_LOCAL_ROOT"/data}
-            CONFIGSTORE=${CONFIGSTORE:-"$COMPOSE_LOCAL_ROOT"/config}
-            CHARM_STORE=${CHARM_STORE:-"$HOME"/.charm-store}
-            TZ_PATH=${TZ_PATH:-"$COMPOSE_LOCAL_ROOT"/timezones}
-            ;;
-        *)
-            echo "System '$os' not supported yet." >&2
-            exit 1
-            ;;
-    esac
-
-    mkdir -p "$COMPOSE_CACHE"
+    mkdir -p "$COMPOSE_LAUNCHER_CACHE"
 
     ## get TZ value and prepare TZ_PATH
     TZ=$(get_tz) || exit 1
@@ -880,6 +888,7 @@ mk_docker_run_options() {
         echo "  CONFIGSTORE: $CONFIGSTORE"
         echo "  COMPOSE_VAR: $COMPOSE_VAR"
         echo "  COMPOSE_CACHE: $COMPOSE_CACHE"
+        echo "  COMPOSE_LAUNCHER_CACHE: $COMPOSE_LAUNCHER_CACHE"
         echo "  SESSION_DIR: $SESSION_DIR"
         echo "  TZ_PATH: $TZ_PATH"
     fi >&2
@@ -904,15 +913,10 @@ run() {
         else
             env=
         fi
-        if [[ "$vol" == "true" && "$opt" == *":/var/cache/compose" ]]; then
-            COMPOSE_CACHE=${opt%%:*}
-        elif [ "$opt" == "-v" ]; then
-            vol=true
-        else
-            vol=
-        fi
     done < <(cat "$COMPOSE_LAUNCHER_OPTS")
 
+    set_os
+
     array_read-0 cmd_args < <(replace_compose_file_opt "$COMPOSE_DOCKER_IMAGE" "$@")
     set -- "${cmd_args[@]}"