fix this other shit and improve building

Overlord-Client/cmd/agent/builder_environment.go

@@ -0,0 +1,17 @@
+//go:build builder_release
+
+package main
+
+import (
+	"os"
+	"strings"
+)
+
+func sanitizeBuilderEnvironment() {
+	for _, entry := range os.Environ() {
+		name, _, ok := strings.Cut(entry, "=")
+		if ok && strings.HasPrefix(strings.ToUpper(name), "OVERLORD_") {
+			_ = os.Unsetenv(name)
+		}
+	}
+}