diff --git a/pkg/config/app_config.go b/pkg/config/app_config.go
index 0ebc1796..e048d268 100644
--- a/pkg/config/app_config.go
+++ b/pkg/config/app_config.go
@@ -525,7 +525,7 @@ func NewAppConfig(name, version, commit, date string, buildSource string, debugg
 }
 
 func configDirForVendor(vendor string, projectName string) string {
-	envConfigDir := os.Getenv("CONFIG_DIR")
+	envConfigDir := os.Getenv("LAZYDOCKER_CONFIG_DIR")
 	if envConfigDir != "" {
 		return envConfigDir
 	}
diff --git a/pkg/config/app_config_test.go b/pkg/config/app_config_test.go
index cd8167e4..be15b1dd 100644
--- a/pkg/config/app_config_test.go
+++ b/pkg/config/app_config_test.go
@@ -49,6 +49,19 @@ func TestDockerComposeCommandMultipleFiles(t *testing.T) {
 	}
 }
 
+func TestConfigDirUsesLazydockerConfigDir(t *testing.T) {
+	expected := t.TempDir()
+	legacy := t.TempDir()
+
+	t.Setenv("LAZYDOCKER_CONFIG_DIR", expected)
+	t.Setenv("CONFIG_DIR", legacy)
+
+	actual := configDir("lazydocker")
+	if actual != expected {
+		t.Fatalf("Expected %s but got %s", expected, actual)
+	}
+}
+
 func TestWritingToConfigFile(t *testing.T) {
 	// init the AppConfig
 	emptyComposeFiles := []string{}