diff --git a/.bin/bashbrew-buildkit-env-setup.sh b/.bin/bashbrew-buildkit-env-setup.sh
index 3ed5205c09fde..74e7797cb6c05 100755
--- a/.bin/bashbrew-buildkit-env-setup.sh
+++ b/.bin/bashbrew-buildkit-env-setup.sh
@@ -47,7 +47,7 @@ _bashbrew_buildkit_env_setup() {
 	local vars='{}'
 
 	local dockerfileTag
-	dockerfileTag="$(grep <<<"$externalPins" -m1 '^docker/dockerfile:')"
+	dockerfileTag="$(grep <<<"$externalPins" -m1 '^tianon/buildkit:')"
 	dockerfileTag="$(_resolve_external_pins "$dockerfileTag")"
 	vars="$(_jq_setenv <<<"$vars" BASHBREW_BUILDKIT_SYNTAX "$dockerfileTag")"
 
diff --git a/.external-pins/docker/dockerfile___1 b/.external-pins/docker/dockerfile___1
deleted file mode 100644
index ce469ee3096fa..0000000000000
--- a/.external-pins/docker/dockerfile___1
+++ /dev/null
@@ -1 +0,0 @@
-sha256:fe40cf4e92cd0c467be2cfc30657a680ae2398318afd50b0c80585784c604f28