diff --git a/v2/Makefile b/v2/Makefile
index 765041c..7d137c3 100644
--- a/v2/Makefile
+++ b/v2/Makefile
@@ -16,9 +16,9 @@ GIT_IS_TAG_COMMIT=$(shell git describe --abbrev=0 --tags > /dev/null 2> /dev/nul
 GIT_BRANCH=$(shell git rev-parse --abbrev-ref HEAD)
 
 # Build variables
-BUILD_VARS=-s -w -X main.GitCommit=${GIT_COMMIT} -X main.GitBranch=${GIT_BRANCH} -X main.BuildTime=${BUILD_TIME} -X main.GitClean=${GIT_CLEAN} -X main.LastGitTag=${LAST_GIT_TAG} -X main.GitTagIsCommit=${GIT_IS_TAG_COMMIT}
+BUILD_VARS?=-s -w -X main.GitCommit=${GIT_COMMIT} -X main.GitBranch=${GIT_BRANCH} -X main.BuildTime=${BUILD_TIME} -X main.GitClean=${GIT_CLEAN} -X main.LastGitTag=${LAST_GIT_TAG} -X main.GitTagIsCommit=${GIT_IS_TAG_COMMIT}
 BUILD_FILES=glauth.go
-TRIM_FLAGS=-trimpath
+TRIM_FLAGS>?=-trimpath
 
 # Targets
 MAIN_TARGETS=linux/amd64,linux/386,linux/arm64,linux/arm-7,darwin/amd64,darwin/arm64,windows/amd64,windows/386