diff --git a/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.CurrentSettingsSections.cs b/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.CurrentSettingsSections.cs
index 2bb60b50..6176c3a9 100644
--- a/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.CurrentSettingsSections.cs
+++ b/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.CurrentSettingsSections.cs
@@ -33,6 +33,7 @@ internal static partial class LogParserResult
             items["build_full_version"] = $"{items["build_version"]}.{items["build_number"]}";
             items["build_commit"] = buildInfo.Groups["commit"].Value.Trim();
             items["build_branch"] = buildInfo.Groups["branch"].Value.Trim();
+            items["build_unknown"] = buildInfo.Groups["unknown"].Value.Trim();
             var fwVersion = buildInfo.Groups["fw_version_installed"].Value;
             if (!string.IsNullOrEmpty(fwVersion))
                 items["fw_version_installed"] = fwVersion;
diff --git a/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.GeneralNotesSection.cs b/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.GeneralNotesSection.cs
index 5e7cac45..e0b595fe 100644
--- a/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.GeneralNotesSection.cs
+++ b/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.GeneralNotesSection.cs
@@ -438,6 +438,7 @@ internal static partial class LogParserResult
         var updateInfo = await CheckForUpdateAsync(items).ConfigureAwait(false);
         var buildBranch = items["build_branch"]?.ToLowerInvariant();
         if (updateInfo is not null
+            && items["build_unknown"] is not {Length: >0}
             && (buildBranch is "master" or "head" or "spu_perf"
                 || buildBranch is not {Length: >0}
                     && (updateInfo.X64?.CurrentBuild is not null || updateInfo.Arm?.CurrentBuild is not null)))
@@ -465,6 +466,15 @@ internal static partial class LogParserResult
             if (buildBranch == "spu_perf")
                 notes.Add($"😱 `{buildBranch}` build is obsolete, current master build offers at least the same level of performance and includes many additional improvements");
         }
+        else if (items["build_unknown"] is "local_build")
+        {
+            if (items["build_commit"] is { Length: > 0 } commit && commit.Contains("AUR"))
+                notes.Add("❌ Unofficial AUR builds are not supported");
+            else if (items["build_number"] is "1" && items["os_type"] is "Linux")
+                notes.Add("❌ Flatpak builds are not supported");
+            else
+                notes.Add("❌ Unofficial builds are not supported");
+        }
 
         if (DesIds.Contains(serial))
             notes.Add("ℹ️ If you experience infinite load screen, clear game cache via `File` → `All games` → `Remove Disk Cache`");
diff --git a/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.cs b/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.cs
index 252f02e0..dafce5fa 100644
--- a/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.cs
+++ b/CompatBot/Utils/ResultFormatters/LogParserResultFormatter.cs
@@ -24,7 +24,7 @@ internal static partial class LogParserResult
     // RPCS3 v0.0.5-7104-a19113025 Alpha | HEAD
     // RPCS3 v0.0.5-42b4ce13a Alpha | minor
     // RPCS3 v0.0.18-local_build Alpha | local_build
-    [GeneratedRegex(@"RPCS3 v(?<version_string>(?<version>(\d|\.)+)(-(?<build>\d+))?-(?<commit>[0-9a-z_]+|unknown))( (?<stage>\w+))?( \| (?<branch>[^|\r\n]+))?( \| Firmware version: (?<fw_version_installed>[^|\r\n]+))?( \| (?<unknown>.*))?\r?$", DefaultSingleLine)]
+    [GeneratedRegex(@"RPCS3 v(?<version_string>(?<version>(\d|\.)+)(-(?<build>(\d|\.)+))?-(?<commit>([0-9a-z_]+|unknown)( \S+)??))( (?<stage>\w+))?( \| (?<branch>[^|\r\n]+))?( \| Firmware version: (?<fw_version_installed>[^|\r\n]+))?( \| (?<unknown>.*))?\r?$", DefaultSingleLine)]
     private static partial Regex BuildInfoInLog();
     [GeneratedRegex(@"(\d{1,2}(th|rd|nd|st) Gen)?(?<cpu_model>[^|@]+?)\s*(((CPU\s*)?@\s*(?<cpu_speed>.+)\s*GHz\s*)|((APU with|((with|w/) )?Radeon|R\d, \d+ Compute) [^|]+)|((\w+[\- ]Core )?Processor))?\s* \| (?<thread_count>\d+) Threads \| (?<memory_amount>[0-9\.\,]+) GiB RAM( \| TSC: (?<tsc>\S+))?( \| (?<cpu_extensions>.*?))?\r?$", DefaultSingleLine)]
     private static partial Regex CpuInfoInLog();