diff --git a/libp2p_mix.nimble b/libp2p_mix.nimble
index 20ba6af..1f7d6f9 100644
--- a/libp2p_mix.nimble
+++ b/libp2p_mix.nimble
@@ -8,10 +8,13 @@ description =
 license = "MIT"
 skipDirs = @["examples", "tests"]
 
-# nim-libp2p pinned to a master commit that includes `pick` utilities (PR #2245).
-# Bump as needed; downstream consumers should align their libp2p pin to match.
+# nim-libp2p pinned to the tip of the mix-deletion PR branch
+# (vacp2p/nim-libp2p#2378). That commit has `MixPubKeyBook` removed from
+# libp2p/peerstore — required so the local definition in libp2p_mix/pool
+# is unambiguous. Once #2378 merges to master and is published, replace
+# the pin with `libp2p >= <new-version>`.
 requires "nim >= 2.0.0",
-  "https://github.com/vacp2p/nim-libp2p.git#bd2d5a745de2844dc326e421b0cb1662541e0d6e",
+  "https://github.com/vacp2p/nim-libp2p.git#074fe1560bc8a413315e2f3d917a63f0ac12105f",
   "chronicles >= 0.11.0", "chronos >= 4.2.2", "metrics", "nimcrypto >= 0.6.0",
   "bearssl >= 0.2.7", "stew >= 0.4.2", "results", "unittest2"
 
diff --git a/libp2p_mix/entry_connection.nim b/libp2p_mix/entry_connection.nim
index 5f4e1e1..e03df8f 100644
--- a/libp2p_mix/entry_connection.nim
+++ b/libp2p_mix/entry_connection.nim
@@ -39,7 +39,7 @@ chronicles.formatIt(MixEntryConnection):
 
 method readOnce*(
     s: MixEntryConnection, pbytes: pointer, nbytes: int
-): Future[int] {.async: (raises: [CancelledError, LPStreamError]), public.} =
+): Future[int] {.async: (raises: [CancelledError, LPStreamError]).} =
   if s.isEof:
     raise newLPStreamEOFError()
 
@@ -69,7 +69,7 @@ method readOnce*(
 
 method write*(
     self: MixEntryConnection, msg: seq[byte]
-): Future[void] {.async: (raises: [CancelledError, LPStreamError]), public.} =
+): Future[void] {.async: (raises: [CancelledError, LPStreamError]).} =
   if msg.len() > DataSize:
     raise newException(LPStreamError, "exceeds max msg size of " & $DataSize & " bytes")
   await self.mixDialer(msg, self.codec, self.destination)
diff --git a/libp2p_mix/exit_connection.nim b/libp2p_mix/exit_connection.nim
index 4ad28a1..3eab2f0 100644
--- a/libp2p_mix/exit_connection.nim
+++ b/libp2p_mix/exit_connection.nim
@@ -11,7 +11,7 @@ type MixExitConnection* = ref object of Connection
 
 method readOnce*(
     self: MixExitConnection, pbytes: pointer, nbytes: int
-): Future[int] {.async: (raises: [CancelledError, LPStreamError]), public.} =
+): Future[int] {.async: (raises: [CancelledError, LPStreamError]).} =
   if self.message.len == 0:
     return 0 # Nothing else to read.
   if self.message.len < nbytes:
@@ -24,7 +24,7 @@ method readOnce*(
 
 method write*(
     self: MixExitConnection, msg: seq[byte]
-): Future[void] {.async: (raises: [CancelledError, LPStreamError]), public.} =
+): Future[void] {.async: (raises: [CancelledError, LPStreamError]).} =
   if msg.len() > DataSize:
     raise newException(LPStreamError, "exceeds max msg size of " & $DataSize & " bytes")
   self.response.add(msg)
diff --git a/libp2p_mix/pool.nim b/libp2p_mix/pool.nim
index 2624782..6d34d82 100644
--- a/libp2p_mix/pool.nim
+++ b/libp2p_mix/pool.nim
@@ -19,6 +19,11 @@ import ./multiaddr as mix_multiaddr
 
 export mix_node.MixPubInfo
 
+type MixPubKeyBook* = ref object of PeerBook[Curve25519Key]
+  ## Tracks Curve25519 mix public keys per peer. Defined here so the mix
+  ## package owns its peer-store extension and libp2p core stays free of
+  ## mix-specific types.
+
 func isSupportedMultiaddr(maddr: MultiAddress): bool =
   ## Returns true if the multiaddress is supported by the mix protocol.
   ## Mix protocol supports IPv4 addresses with TCP or QUIC-v1 transports,
diff --git a/libp2p_mix/reply_connection.nim b/libp2p_mix/reply_connection.nim
index f228fbe..4405526 100644
--- a/libp2p_mix/reply_connection.nim
+++ b/libp2p_mix/reply_connection.nim
@@ -16,12 +16,12 @@ type MixReplyConnection* = ref object of Connection
 
 method readExactly*(
     self: MixReplyConnection, pbytes: pointer, nbytes: int
-): Future[void] {.async: (raises: [CancelledError, LPStreamError]), public.} =
+): Future[void] {.async: (raises: [CancelledError, LPStreamError]).} =
   raise newException(LPStreamError, "MixReplyConnection does not allow reading")
 
 method write*(
     self: MixReplyConnection, msg: seq[byte]
-): Future[void] {.async: (raises: [CancelledError, LPStreamError]), public.} =
+): Future[void] {.async: (raises: [CancelledError, LPStreamError]).} =
   if msg.len() > DataSize:
     raise newException(LPStreamError, "exceeds max msg size of " & $DataSize & " bytes")
   await self.mixReplyDialer(self.surbs, msg)