diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6a29472..2b3cf7b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -93,6 +93,7 @@ jobs:
     - name: Install hl
       run: |
         git clone https://github.com/HaxeFoundation/hashlink.git hashlink
+        sudo apt-get update
         sudo apt-get install -qqy libpng-dev libturbojpeg-dev libvorbis-dev libopenal-dev libsdl2-dev libglu1-mesa-dev libmbedtls-dev libuv1-dev libsqlite3-dev
         cd hashlink
         make
diff --git a/hld/Debugger.hx b/hld/Debugger.hx
index 81d7c4f..0348294 100644
--- a/hld/Debugger.hx
+++ b/hld/Debugger.hx
@@ -398,6 +398,7 @@ class Debugger {
 
 		readThreads();
 		prepareStack(cmd.r == Watchbreak);
+		eval.onBeforeBreak();
 
 		// if breakpoint has a condition, try to evaluate and do not actually break on false
 		if( !onStep && !onEvalCall && !onPause && condition != null ) {
diff --git a/hld/Eval.hx b/hld/Eval.hx
index 68b8d68..a36eced 100644
--- a/hld/Eval.hx
+++ b/hld/Eval.hx
@@ -47,6 +47,7 @@ class Eval {
 	var funIndex : Int;
 	var codePos : Int;
 	var ebp : Pointer;
+	var guidNames : Int64Map<String>;
 
 	public var maxArrLength : Int = 10;
 	public var maxBytesLength : Int = 128;
@@ -83,6 +84,10 @@ class Eval {
 		this.ebp = ebp;
 	}
 
+	public function onBeforeBreak() {
+		this.guidNames = null;
+	}
+
 	public function eval( expr : String ) : Value {
 		if( expr == null || expr == "" )
 			return null;
@@ -986,6 +991,16 @@ class Eval {
 				c + "(" + [for( v in values ) valueStr(v,maxStringRec)].join(", ") + ")";
 		case VInlined(_):
 			"inlined";
+		case VGuid(i, name):
+			switch( v.hint ) {
+			case HBin: Value.int64Str(i, 2);
+			case HHex: Value.int64Str(i, 16);
+			default:
+				var str = Value.int64GuidStr(i);
+				if( name != null )
+					str = '$name ($str)';
+				str;
+			}
 		}
 		return str;
 	}
@@ -1078,6 +1093,10 @@ class Eval {
 			VBool(m.getUI8(0) != 0);
 		case HPacked(t):
 			return { v : VPointer(p), t : t.v };
+		case HGUID:
+			var i64 = haxe.Int64.make(readI32(p.offset(4)), readI32(p));
+			var name = getGuidName(i64);
+			return { v : VGuid(i64, name), t : t };
 		default:
 			p = readPointer(p);
 			return valueCast(p, t);
@@ -1611,4 +1630,43 @@ class Eval {
 		return module.code.types[tid];
 	}
 
+	function getGuidName( i64 : haxe.Int64 ) : Null<String> {
+		if( guidNames == null ) {
+			guidNames = new Int64Map();
+			if( jit.hlVersion >= 1.15 ) {
+				var pmap = readPointer(jit.threads.offset(jit.align.ptr*3 + 8));
+				if( !pmap.isNull() ) {
+					var m = @:privateAccess makeMap(pmap, HI64);
+					switch( m ) {
+					case VMap(_, nkeys, readKey, readValue, _):
+						for (n in 0...nkeys) {
+							var k = readKey(n);
+							var v = readValue(n);
+							switch( [k.v, v.v] ) {
+							case [VInt64(ki64), VString(vname, _)]:
+								guidNames.set(ki64, vname);
+							default:
+							}
+						}
+					default: throw "assert";
+					}
+				}
+			}
+		}
+		return guidNames.get(i64);
+	}
+
+}
+
+// Map<Int64, V> does not work on JS, see https://github.com/HaxeFoundation/haxe/issues/9872
+class Int64Map<T> extends haxe.ds.BalancedTree<haxe.Int64, T> {
+	override function compare(k1:haxe.Int64, k2:haxe.Int64):Int {
+		return if( k1 == k2 ) {
+			0;
+		} else if( k1 > k2 ) {
+			1;
+		} else {
+			-1;
+		}
+	}
 }
diff --git a/hld/Value.hx b/hld/Value.hx
index 5954053..345da95 100644
--- a/hld/Value.hx
+++ b/hld/Value.hx
@@ -18,6 +18,7 @@ enum ValueRepr {
 	VEnum( c : String, values : Array<Value>, p : Pointer );
 	VBytes( length : Int, read : Int -> Int, p : Pointer );
 	VInlined( fields : Array<InlinedField> );
+	VGuid( i : haxe.Int64, name : String );
 }
 
 enum FunRepr {
@@ -125,6 +126,20 @@ enum Hint {
 		return value;
 	}
 
+	static final GUIDBASE = "#&0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+	public static function int64GuidStr( value : haxe.Int64 ) : String {
+		if( value == 0 )
+			return "0";
+		var s = "";
+		for( i in 0...11 ) {
+			if( i == 3 || i == 7 )
+				s = '-' + s;
+			s = GUIDBASE.charAt(value.low&63) + s;
+			value = value >> 6;
+		}
+		return s;
+	}
+
 	public static function intEnumFlags( value : Int, eproto : format.hl.Data.EnumPrototype ) : String {
 		var f = "";
 		for( i in 0...eproto.constructs.length ) {
diff --git a/tests/RunCi.hx b/tests/RunCi.hx
index b21ea32..5003082 100644
--- a/tests/RunCi.hx
+++ b/tests/RunCi.hx
@@ -11,7 +11,15 @@ class RunCi {
 			var fullPath = sys.FileSystem.absolutePath(basePath + "unit/" + test);
 			log('[INFO] $test begin');
 			changeDirectory(fullPath);
-			Sys.command("haxe", ["--main", "Test", "-hl", "test.hl"]);
+			var compileargs = ["--main", "Test", "-hl", "test.hl"];
+			try {
+				var flags = sys.io.File.getContent(fullPath + "/compile.txt").split(" ");
+				compileargs = compileargs.concat(flags);
+			} catch( e ) {
+				trace("error" + e.message);
+			}
+			trace("run haxe with " + compileargs);
+			Sys.command("haxe", compileargs);
 			var process = new sys.io.Process("hl", [debuggerHL, "--input", "input.txt"]);
 			var expectedOutput = sys.io.File.getContent(fullPath + "/output.txt");
 			var startingTime = haxe.Timer.stamp();
diff --git a/tests/unit/TestGuid/Test.hx b/tests/unit/TestGuid/Test.hx
new file mode 100644
index 0000000..c788491
--- /dev/null
+++ b/tests/unit/TestGuid/Test.hx
@@ -0,0 +1,13 @@
+class Test {
+	static function main() {
+		var id : hl.GUID = makeGUID(0xF1561985,0xF15008);
+		var id2 : hl.GUID = makeGUID(0xF1561985,0xF15009);
+		hl.Api.registerGUIDName(id, "SomeName");
+		Sys.println(Std.string(id));
+		Sys.println(Std.string(id2));
+	}
+
+	static function makeGUID(high,low) : hl.GUID {
+		return haxe.Int64.make(high,low);
+	}
+}
diff --git a/tests/unit/TestGuid/compile.txt b/tests/unit/TestGuid/compile.txt
new file mode 100644
index 0000000..e9f297b
--- /dev/null
+++ b/tests/unit/TestGuid/compile.txt
@@ -0,0 +1 @@
+-D hl-ver=1.15.0
\ No newline at end of file
diff --git a/tests/unit/TestGuid/input.txt b/tests/unit/TestGuid/input.txt
new file mode 100644
index 0000000..32638d5
--- /dev/null
+++ b/tests/unit/TestGuid/input.txt
@@ -0,0 +1,11 @@
+--ci
+test.hl
+"b Test.hx:5"
+"b Test.hx:7"
+r
+"p id"
+"p id2"
+r
+"p id"
+"p id2"
+q
diff --git a/tests/unit/TestGuid/output.txt b/tests/unit/TestGuid/output.txt
new file mode 100644
index 0000000..80bccef
--- /dev/null
+++ b/tests/unit/TestGuid/output.txt
@@ -0,0 +1,17 @@
+> b Test.hx:5
+Breakpoint set line 5
+> b Test.hx:7
+Breakpoint set line 7
+> r
+Thread paused Test.hx:5 ($Test::main)
+> p id
+z3K4-MI#w-J#6 : hl.GUID
+> p id2
+z3K4-MI#w-J#7 : hl.GUID
+> r
+Thread paused Test.hx:7 ($Test::main)
+> p id
+SomeName (z3K4-MI#w-J#6) : hl.GUID
+> p id2
+z3K4-MI#w-J#7 : hl.GUID
+> q