diff --git a/docker/Dockerfile.clightning b/docker/Dockerfile.clightning
index 7cd9a37..374733d 100644
--- a/docker/Dockerfile.clightning
+++ b/docker/Dockerfile.clightning
@@ -61,7 +61,7 @@ RUN git config --global user.name "John Doe" && \
     cd lightning && \
     poetry config virtualenvs.create false && \
     poetry install && \
-    ./configure --enable-developer && \
+    ./configure && \
     make -j$(nproc)
 
 RUN mkdir lnprototest
diff --git a/lnprototest/event.py b/lnprototest/event.py
index 96f2cf7..6e858ba 100644
--- a/lnprototest/event.py
+++ b/lnprototest/event.py
@@ -346,7 +346,7 @@ def action(self, runner: "Runner") -> bool:
                     raise EventError(
                         self, "Got msg banned by {}: {}".format(e, binmsg.hex())
                     )
-            logging.debug(f"raw msg {binmsg}")
+            logging.debug(f"raw msg {''.join('%02x' % b for b in binmsg)}")
             # Might be completely unknown to namespace.
             try:
                 msg = Message.read(namespace(), io.BytesIO(binmsg))
@@ -378,7 +378,7 @@ class Block(Event):
 
     def __init__(
         self,
-        blockheight: int,
+        blockheight: Union[int, Callable],
         number: Union[int, Callable] = 1,
         txs: List[ResolvableStr] = [],
     ):
@@ -389,6 +389,10 @@ def __init__(
 
     def action(self, runner: "Runner") -> bool:
         super().action(runner)
+
+        if isinstance(self.blockheight, Callable):
+            self.blockheight = self.resolve_arg(None, runner, self.blockheight)
+
         # Oops, did they ask us to produce a block with no predecessor?
         if runner.getblockheight() + 1 < self.blockheight:
             raise SpecFileError(
@@ -397,7 +401,6 @@ def action(self, runner: "Runner") -> bool:
                     self.blockheight, runner.getblockheight()
                 ),
             )
-
         # Throw away blocks we're replacing.
         if runner.getblockheight() >= self.blockheight:
             runner.trim_blocks(self.blockheight - 1)
diff --git a/lnprototest/utils/ln_spec_utils.py b/lnprototest/utils/ln_spec_utils.py
index 8becebf..0eede74 100644
--- a/lnprototest/utils/ln_spec_utils.py
+++ b/lnprototest/utils/ln_spec_utils.py
@@ -199,7 +199,7 @@ def open_and_announce_channel_helper(
         ),
         # Mine it and get it deep enough to confirm channel.
         Block(
-            blockheight=103,
+            blockheight=block_height,
             number=stash_field_from_event(
                 "accept_channel", field_name="minimum_depth", dummy_val=3
             ),
@@ -216,9 +216,12 @@ def open_and_announce_channel_helper(
             second_per_commitment_point=local_keyset.per_commit_point(1),
         ),
         # wait confirmations
-        Block(blockheight=103, number=6),
-        # BOLT 2:
         #
-        # Once both nodes have exchanged channel_ready (and optionally announcement_signatures),
-        # the channel can be used to make payments via Hashed Time Locked Contracts.
+        # FIXME: Uh! do you know why this sucks, because lnprototest is lazy evaluated.
+        # This is huggly, and we should change it at some point but this now works.
+        Block(
+            blockheight=lambda runner, event, _: block_height
+            + runner.get_stash(event, "accept_channel").fields["minimum_depth"],
+            number=6,
+        ),
     ]
diff --git a/tests/test_bolt2-01-open_channel.py b/tests/test_bolt2-01-open_channel.py
index f70d014..8a9d0ac 100644
--- a/tests/test_bolt2-01-open_channel.py
+++ b/tests/test_bolt2-01-open_channel.py
@@ -299,6 +299,10 @@ def test_open_channel_opener_side_wrong_announcement_signatures(runner: Runner)
     dummy_sign = "138c93afb2013c39f959e70a163c3d6d8128cf72f8ae143f87b9d1fd6bb0ad30321116b9c58d69fca9fb33c214f681b664e53d5640abc2fdb972dc62a5571053"
     short_channel_id = opts["short_channel_id"]
     test_events = [
+        # BOLT 2:
+        #
+        # - Once both nodes have exchanged channel_ready (and optionally announcement_signatures),
+        #   the channel can be used to make payments via Hashed Time Locked Contracts.
         ExpectMsg(
             "announcement_signatures",
             channel_id=channel_id(),