CFG_VER is always a concrete version: dev builds stamp v0.0.0, never "dev"

internal/config/sample.go

@@ -59,8 +59,15 @@ func sampleEntries(logFile string) []sampleEntry {
 // (a Windows service has no console). CFG_VER records the version that
 // wrote the file so later installs can upgrade it.
 func SampleEnv(version, logFile string) string {
+	// CFG_VER is always a concrete vX.Y.Z — never "dev". A dev build
+	// stamps v0.0.0, which sorts older than any release, so the next
+	// release install upgrades the file and stamps a proper version.
+	cfgVer := version
+	if cfgVer == "" || cfgVer == "dev" {
+		cfgVer = "v0.0.0"
+	}
 	var b strings.Builder
-	fmt.Fprintf(&b, "CFG_VER=%s\n", version)
+	fmt.Fprintf(&b, "CFG_VER=%s\n", cfgVer)
 	b.WriteString("# Config format reference, written by the installer — do not edit.\n")
 	b.WriteString("# The installer uses it to append newly added settings on updates.\n\n")
 	b.WriteString("# gpu-turnstile configuration\n")