sleep command cannot be used

Signed-off-by: Phani Sajja <[email protected]>

components/studio/bin/hab-studio.sh

@@ -1040,8 +1040,10 @@ chown_certs() {
   fi
 }
 
-# **Internal**
-# Mimic delay using busy loop
+# **Internal** Mimic delay using busy loop
+# We cannot use the sleep command as we have already unmounted, but we are
+# encountering 'device busy' failures on AArch64 Linux. We need this because 
+# we unmounted the resource and want to allow some time for it to be freed.
 busy_sleep() {
     local duration=$1
     local end_time=$(( $(date +%s) + duration ))

components/studio/libexec/hab-studio-type-default.sh

@@ -101,9 +101,6 @@ finish_setup() {
   _hab pkg binlink core/bash bash
   _hab pkg binlink core/bash sh
 
-  # binlink sleep command
-  _hab pkg binlink core/coreutils sleep
-
   # Create a wrapper to `build` so that any calls to it have a super-stripped
   # `$PATH` and not whatever augmented version is currently in use. This should
   # mean that running `build` from inside a `studio enter` and running `studio