eval $$(apt-config $(foreach a,$(APTCONF),-cetc/apt-conf.d/$a) \
shell proxy Acquire::http::proxy); \
case $${proxy+t} in (t) echo "$$proxy" ;; (*) echo nil ;; esac)
eval $$(apt-config $(foreach a,$(APTCONF),-cetc/apt-conf.d/$a) \
shell proxy Acquire::http::proxy); \
case $${proxy+t} in (t) echo "$$proxy" ;; (*) echo nil ;; esac)