tweak slightly

Author: David Coe

go/adbc/pkg/Makefile

@@ -29,9 +29,9 @@ else
 endif
 
 ifeq ($(shell go env GOOS),windows)
-	GIT_VERSION=$(shell powershell -Command "git tag --sort=-v:refname --points-at $(git rev-list --tags --max-count=1) | Select-Object -First 1")
+	GIT_VERSION := $(shell powershell -Command "git tag --sort=-v:refname --points-at $$(git rev-list --tags --max-count=1) | Select-Object -First 1")
 else
-	GIT_VERSION=$(shell git tag --sort=-v:refname --points-at $(shell git rev-list --tags --max-count=1 2>/dev/null) 2>/dev/null | head -n 1)
+	GIT_VERSION=$(shell git tag -l --points-at $(shell git rev-list --tags --max-count=1) --sort=-v:refname | head -n 1)
 endif
 
 GIT_VERSION ?= unknown