+# Workaround about issue with the particular GPG keyserver:
+# trying several explicit keyservers until the command succeeds
+# (see https://github.com/jacobalberty/unifi-docker/issues/64)
+for server in $(shuf -e pool.sks-keyservers.net \
+ ha.pool.sks-keyservers.net \
+ hkp://p80.pool.sks-keyservers.net:80 \
+ keyserver.ubuntu.com \
+ hkp://keyserver.ubuntu.com:80 \
+ pgp.mit.edu) ; do
+ ${GPG} -q --keyserver "$server" --recv-keys 37C84554E7E0A261E4F76E1ED26E6ED000654A3E && break || :
+done