diff --git a/Makefile b/Makefile
index 2a7c29a..e7b6e71 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,5 @@
 SHELL := /bin/bash
 
-GOBIN ?= $(shell go env GOPATH)/bin
-GOMAKE ?= github.com/tkrop/go-make@latest
-TARGETS := $(shell command -v go-make >/dev/null || \
-	go install $(GOMAKE) && go-make targets)
-
-
 # Include custom variables to modify behavior.
 ifneq ("$(wildcard Makefile.vars)","")
 	include Makefile.vars
@@ -13,20 +7,16 @@ else
 	$(warning warning: please customize variables in Makefile.vars)
 endif
 
+GOBIN ?= $(shell go env GOPATH)/bin
+GOMAKE ?= github.com/tkrop/go-make@v0.0.10
+TARGETS := $(shell command -v go-make >/dev/null || \
+	go install $(GOMAKE) && go-make targets)
+
+# Declare all targets phony to make them available for auto-completion.
+.PHONY: $(TARGETS)
 
-# Include standard targets from go-make providing group targets as well as
-# single target targets. The group target is used to delegate the remaining
-# request targets, while the single target can be used to define the
-# precondition of custom target.
-.PHONY: $(TARGETS) $(addprefix target/,$(TARGETS))
+# Delegate all targets to go-make in one call.
+# TODO: consider solution that does not delegate local goals.
 $(eval $(lastwords $(MAKECMDGOALS)):;@:)
-$(firstword $(MAKECMDGOALS)):
+all $(firstword $(MAKECMDGOALS))::
 	$(GOBIN)/go-make $(MAKEFLAGS) $(MAKECMDGOALS);
-$(addprefix target/,$(TARGETS)): target/%:
-	$(GOBIN)/go-make $(MAKEFLAGS) $*;
-
-
-# Include custom targets to extend scripts.
-ifneq ("$(wildcard Makefile.ext)","")
-	include Makefile.ext
-endif
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..8acdd82
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+0.0.1
diff --git a/go.mod b/go.mod
index 3c86ae9..b2b3693 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ require (
 	github.com/h2non/gock v1.2.0
 	github.com/huandu/go-clone v1.6.0
 	github.com/stretchr/testify v1.8.4
-	golang.org/x/exp v0.0.0-20231206192017-f3f8817b8deb
+	golang.org/x/exp v0.0.0-20231219180239-dc181d75b848
 	golang.org/x/text v0.13.0
 	golang.org/x/tools v0.16.1
 )
diff --git a/go.sum b/go.sum
index c6e461d..ac43f78 100644
--- a/go.sum
+++ b/go.sum
@@ -33,8 +33,8 @@ github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXl
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/exp v0.0.0-20231206192017-f3f8817b8deb h1:c0vyKkb6yr3KR7jEfJaOSv4lG7xPkbN6r52aJz1d8a8=
-golang.org/x/exp v0.0.0-20231206192017-f3f8817b8deb/go.mod h1:iRJReGqOEeBhDZGkGbynYwcHlctCvnjTYIamk7uXpHI=
+golang.org/x/exp v0.0.0-20231219180239-dc181d75b848 h1:+iq7lrkxmFNBM7xx+Rae2W6uyPfhPeDWD+n+JgppptE=
+golang.org/x/exp v0.0.0-20231219180239-dc181d75b848/go.mod h1:iRJReGqOEeBhDZGkGbynYwcHlctCvnjTYIamk7uXpHI=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
 golang.org/x/mod v0.14.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=