Speedup make usage

Con't get the version information on every call to speedup the make usage.

Makefile

@@ -1,15 +1,13 @@
 SHELL := /bin/bash
 MAX_LINE_LENGTH := 119
-POETRY_VERSION := $(shell poetry --version 2>/dev/null)
-COMPOSE_VERSION := $(shell poetry run docker-compose --version 2>/dev/null)
 
 help: ## List all commands
 	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9 -]+:.*?## / {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
 
 check-poetry:
-	@if [[ "${POETRY_VERSION}" == *"Poetry"* ]] ; \
+	@if [[ "$(shell poetry --version 2>/dev/null)" == *"Poetry"* ]] ; \
 	then \
-		echo "Found ${POETRY_VERSION}, ok." ; \
+		echo "Poetry found, ok." ; \
 	else \
 		echo 'Please install poetry first, with e.g.:' ; \
 		echo 'make install-poetry' ; \
@@ -17,9 +15,9 @@ check-poetry:
 	fi
 
 install-poetry: ## install or update poetry
-	@if [[ "${POETRY_VERSION}" == *"Poetry"* ]] ; \
+	@if [[ "$(shell poetry --version 2>/dev/null)" == *"Poetry"* ]] ; \
 	then \
-		echo 'Update poetry v$(POETRY_VERSION)' ; \
+		echo 'Update poetry' ; \
 		poetry self update ; \
 	else \
 		echo 'Install poetry' ; \
@@ -96,9 +94,9 @@ create-starter:  ## Create starter file.
 
 
 check-compose:
-	@if [[ "${COMPOSE_VERSION}" == *"docker-compose version"* ]] ; \
+	@if [[ "$(shell poetry run docker-compose --version 2>/dev/null)" = *"docker-compose version"* ]] ; \
 	then \
-		echo "Found ${COMPOSE_VERSION}, ok." ; \
+		echo "docker-compose found, ok." ; \
 	else \
 		echo 'Please install extras first, with e.g.:' ; \
 		echo 'make install-compose' ; \