diff --git a/manifest.scm b/manifest.scm
index 21af7ff..1049c6d 100644
--- a/manifest.scm
+++ b/manifest.scm
@@ -5,4 +5,21 @@
              (gnu packages guile)
              (gnu packages guile-xyz))
 
-(packages->manifest (list guile-next guile-hoot gnu-make zip))
+(define guile-hoot*
+  (let ((commit "61c072433020d7669c7edaf18803d790bf984a03"))
+    (package
+     (inherit guile-hoot)
+     (version (string-append (package-version guile-hoot)
+                             "-1." (string-take commit 7)))
+     (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://gitlab.com/spritely/guile-hoot.git")
+                    (commit commit)))
+              (sha256
+               (base32
+                "0isx20rk92xlhcc5spbbxzs2dgmqcsjzsm82iri195894ir59f4f"))))
+     (arguments
+      '(#:tests? #f)))))
+
+(packages->manifest (list guile-next guile-hoot* gnu-make zip))
diff --git a/reflect.js b/reflect.js
index af6b0da..24a92fe 100644
--- a/reflect.js
+++ b/reflect.js
@@ -5,6 +5,8 @@ class Char {
     }
     toString() {
         let ch = String.fromCodePoint(this.codepoint);
+        if (ch == '\n') return '#\\newline';
+        if (ch == '\r') return '#\\return';
         if (ch.match(/[a-zA-Z0-9$[\]().]/)) return `#\\${ch}`;
         return `#\\x${this.codepoint.toString(16)}`;
     }
@@ -137,6 +139,7 @@ class WeakTable extends HeapObject { toString() { return "#<weak-table>"; } }
 class Fluid extends HeapObject { toString() { return "#<fluid>"; } }
 class DynamicState extends HeapObject { toString() { return "#<dynamic-state>"; } }
 class Syntax extends HeapObject { toString() { return "#<syntax>"; } }
+class SyntaxTransformer extends HeapObject { toString() { return "#<syntax-transformer>"; } }
 class Port extends HeapObject { toString() { return "#<port>"; } }
 class Struct extends HeapObject { toString() { return "#<struct>"; } }
 
@@ -200,123 +203,6 @@ class IterableWeakSet {
     }
 }
 
-// See:
-// https://github.com/tc39/proposal-weakrefs?tab=readme-ov-file#iterable-weakmaps
-class IterableWeakMap {
-    #weakMap = new WeakMap();
-    #refSet = new Set();
-    #finalizationGroup = new FinalizationRegistry(IterableWeakMap.#cleanup);
-
-    static #cleanup({ set, ref }) {
-        set.delete(ref);
-    }
-
-    constructor(iterable) {
-        for (const [key, value] of iterable) {
-            this.set(key, value);
-        }
-    }
-
-    set(key, value) {
-        const ref = new WeakRef(key);
-
-        this.#weakMap.set(key, { value, ref });
-        this.#refSet.add(ref);
-        this.#finalizationGroup.register(key, {
-            set: this.#refSet,
-            ref
-        }, ref);
-    }
-
-    get(key) {
-        const entry = this.#weakMap.get(key);
-        return entry && entry.value;
-    }
-
-    delete(key) {
-        const entry = this.#weakMap.get(key);
-        if (!entry) {
-            return false;
-        }
-
-        this.#weakMap.delete(key);
-        this.#refSet.delete(entry.ref);
-        this.#finalizationGroup.unregister(entry.ref);
-        return true;
-    }
-
-    *[Symbol.iterator]() {
-        for (const ref of this.#refSet) {
-            const key = ref.deref();
-            if (!key) continue;
-            const { value } = this.#weakMap.get(key);
-            yield [key, value];
-        }
-    }
-
-    entries() {
-        return this[Symbol.iterator]();
-    }
-
-    *keys() {
-        for (const [key, value] of this) {
-            yield key;
-        }
-    }
-
-    *values() {
-        for (const [key, value] of this) {
-            yield value;
-        }
-    }
-}
-// class IterableWeakMap {
-//     #array;
-//     #map;
-//     constructor() { this.#array = []; this.#map = new WeakMap; }
-//     #kill(i) {
-//         let tail = this.#array.pop();
-//         if (i < this.#array.length)
-//             this.#array[i] = tail;
-//     }
-//     #geti(i) {
-//         // If a dead weak ref is at i then kill it and try again with
-//         // the next weak ref.
-//         while (true) {
-//             if (i >= this.#array.length)
-//                 return null;
-//             let obj = this.#array[i].deref();
-//             if (obj)
-//                 return obj;
-//             this.#kill(i);
-//         }
-//     }
-//     #cleanup() {
-//         let i = 0;
-//         while (this.#get(i)) i++;
-//     }
-//     has(k) { return this.#map.has(k); }
-//     get(k) { return this.#map.get(k); }
-//     set(k, v) {
-//         if (this.#array.length % 32 == 0)
-//             this.#cleanup();
-//         this.#map.set(k, v);
-//         this.#array.push(new WeakRef(k));
-//     }
-//     delete(k) {
-//         if (!this.has(k))
-//             return;
-//         this.#map.delete(k);
-//         let i = 0;
-//         while (this.#geti(i) != k) i++;
-//         this.#kill(i);
-//     }
-//     *[Symbol.iterator]() {
-//         for (let i = 0, k; k = this.#geti(i); i++)
-//             yield [k, this.get(k)];
-//     }
-// }
-
 class Scheme {
     #instance;
     #abi;
@@ -362,6 +248,22 @@ class Scheme {
                 };
             }
         });
+        mod.set_finalization_handler({
+            make_finalization_registry: (f) => new FinalizationRegistry(f),
+            finalization_registry_register: (registry, target, heldValue) => {
+                // heldValue is a Wasm struct and needs to be wrapped
+                // so that when it goes back to Scheme via the
+                // finalizer callback it is seen as a Scheme value and
+                // not an external one.
+                registry.register(target, this.#to_js(heldValue));
+            },
+            finalization_registry_register_with_token: (registry, target, heldValue, unregisterToken) => {
+                registry.register(target, this.#to_js(heldValue), unregisterToken);
+            },
+            finalization_registry_unregister: (registry, unregisterToken) => {
+                return registry.unregister(unregisterToken);
+            }
+        });
         let proc = new Procedure(this, mod.get_export('$load').value);
         return proc.call();
     }
@@ -447,6 +349,7 @@ class Scheme {
             fluid: () => new Fluid(this, scm),
             'dynamic-state': () => new DynamicState(this, scm),
             syntax: () => new Syntax(this, scm),
+            'syntax-transformer': () => new SyntaxTransformer(this, scm),
             port: () => new Port(this, scm),
             struct: () => new Struct(this, scm),
             'extern-ref': () => api.extern_value(scm)
@@ -601,6 +504,7 @@ class SchemeModule {
     #io_handler;
     #debug_handler;
     #ffi_handler;
+    #finalization_handler;
     static #rt = {
         bignum_from_string(str) { return BigInt(str); },
         bignum_from_i32(n) { return BigInt(n); },
@@ -676,14 +580,6 @@ class SchemeModule {
         weak_map_set(map, k, v) { return map.set(k, v); },
         weak_map_delete(map, k) { return map.delete(k); },
 
-        make_finalization_registry(f) { return new FinalizationRegistry(f); },
-        finalization_registry_register(registry, target, heldValue, unregisterToken) {
-            registry.register(target, heldValue, unregisterToken);
-        },
-        finalization_registry_unregister(registry, unregisterToken) {
-            registry.unregister(unregisterToken);
-        },
-
         fsqrt: Math.sqrt,
         fsin: Math.sin,
         fcos: Math.cos,
@@ -979,9 +875,23 @@ class SchemeModule {
                 return mod.#ffi_handler.procedure_to_extern(proc);
             }
         };
+        let finalization = {
+            make_finalization_registry(f) {
+                return mod.#finalization_handler.make_finalization_registry(f);
+            },
+            finalization_registry_register(registry, target, heldValue) {
+                mod.#finalization_handler.finalization_registry_register(registry, target, heldValue);
+            },
+            finalization_registry_register_with_token(registry, target, heldValue, unregisterToken) {
+                mod.#finalization_handler.finalization_registry_register_with_token(registry, target, heldValue, unregisterToken);
+            },
+            finalization_registry_unregister(registry, unregisterToken) {
+                return mod.#finalization_handler.finalization_registry_unregister(registry, unregisterToken);
+            }
+        };
         let imports = {
           rt: SchemeModule.#rt,
-          abi, debug, io, ffi, ...user_imports
+          abi, debug, io, ffi, finalization, ...user_imports
         };
         let { module, instance } = await instantiate_streaming(path, imports);
         let mod = new SchemeModule(instance);
@@ -990,6 +900,7 @@ class SchemeModule {
     set_io_handler(h) { this.#io_handler = h; }
     set_debug_handler(h) { this.#debug_handler = h; }
     set_ffi_handler(h) { this.#ffi_handler = h; }
+    set_finalization_handler(h) { this.#finalization_handler = h; }
     all_exports() { return this.#instance.exports; }
     exported_abi() {
         let abi = {}
diff --git a/reflect.wasm b/reflect.wasm
index 2513e8c..a4d85c5 100644
Binary files a/reflect.wasm and b/reflect.wasm differ