Use curl to fetch Hex dependencies

core/deps.mk

@@ -498,21 +498,12 @@ define dep_fetch_cp
 	cp -R $(call dep_repo,$(1)) $(DEPS_DIR)/$(call dep_name,$(1));
 endef
 
-define dep_fetch_hex.erl
-	ssl:start(),
-	inets:start(),
-	{ok, {{_, 200, _}, _, Body}} = httpc:request(get,
-		{"https://s3.amazonaws.com/s3.hex.pm/tarballs/$(1)-$(2).tar", []},
-		[], [{body_format, binary}]),
-	{ok, Files} = erl_tar:extract({binary, Body}, [memory]),
-	{_, Source} = lists:keyfind("contents.tar.gz", 1, Files),
-	ok = erl_tar:extract({binary, Source}, [{cwd, "$(call core_native_path,$(DEPS_DIR)/$1)"}, compressed]),
-	halt()
-endef
-
 # Hex only has a package version. No need to look in the Erlang.mk packages.
 define dep_fetch_hex
-	$(call erlang,$(call dep_fetch_hex.erl,$(1),$(strip $(word 2,$(dep_$(1))))));
+	mkdir -p $(ERLANG_MK_TMP)/hex $(DEPS_DIR)/$1; \
+	$(call core_http_get,$(ERLANG_MK_TMP)/hex/$1.tar,\
+		https://s3.amazonaws.com/s3.hex.pm/tarballs/$1-$(strip $(word 2,$(dep_$1))).tar); \
+	tar -xOf $(ERLANG_MK_TMP)/hex/$1.tar contents.tar.gz | tar -C $(DEPS_DIR)/$1 -xz;
 endef
 
 define dep_fetch_fail