diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index da5371e..3e9e75e 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -16,4 +16,6 @@ updates:
     schedule:
       interval: "cron"
       cronjob: "1 2 1,15 * *"
-    versioning-strategy: "increase-if-necessary"
+    # We want "increase-if-neccessary", but it's not supported for cargo.
+    # See dependabot/dependabot-core#4009
+    versioning-strategy: "lockfile-only"
diff --git a/Makefile b/Makefile
index a7bb398..e34dd1c 100644
--- a/Makefile
+++ b/Makefile
@@ -3,8 +3,6 @@ MODULE		= nginx_acme
 BUILD		?= debug
 TESTS		?= t/
 NGX_CARGO	?= cargo
-# will be used to print host-tuple
-NGX_RUSTC	?= rustc
 
 NGINX_CONFIGURE_BASE	= \
 	auto/configure \
diff --git a/build/compat-gnu.mk b/build/compat-gnu.mk
index d2e3eb0..2364e0f 100644
--- a/build/compat-gnu.mk
+++ b/build/compat-gnu.mk
@@ -1,4 +1,4 @@
-HOST_TUPLE	:= $(shell $(NGX_RUSTC) --print=host-tuple)
+HOST_TUPLE	:= $(shell $(NGX_CARGO) -vV | awk '/^host: / { print $$2; }')
 
 # extension for Rust cdylib targets
 ifeq ($(shell uname), Darwin)
diff --git a/build/compat-posix.mk b/build/compat-posix.mk
index 884e7ea..f3af3a6 100644
--- a/build/compat-posix.mk
+++ b/build/compat-posix.mk
@@ -1,4 +1,4 @@
-HOST_TUPLE	!= $(NGX_RUSTC) --print=host-tuple
+HOST_TUPLE	!= $(NGX_CARGO) -vV | awk '/^host: / { print $$2; }'
 
 # bsd make compatibility
 CURDIR		?= $(.CURDIR)