diff --git a/Cargo.lock b/Cargo.lock
index 169770ba..51bccd32 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2785,6 +2785,7 @@ dependencies = [
  "anyhow",
  "ashpd",
  "futures-util",
+ "libc",
  "punktfunk-core",
  "quinn",
  "tokio",
diff --git a/crates/pf-clipboard/Cargo.toml b/crates/pf-clipboard/Cargo.toml
index 5ce9bca3..9b2970e4 100644
--- a/crates/pf-clipboard/Cargo.toml
+++ b/crates/pf-clipboard/Cargo.toml
@@ -27,6 +27,9 @@ tokio = { version = "1", features = ["rt", "rt-multi-thread", "sync", "time", "m
 # answer. Reusing ashpd's zbus re-export keeps one zbus version across the workspace.
 ashpd = "0.13"
 futures-util = "0.3"
+# Raw fd plumbing on the paste pipes: `pipe2(O_CLOEXEC)` + `poll` on the data-control receive
+# side, `fcntl` un-nonblocking on Mutter's transfer fd.
+libc = "0.2"
 wayland-client = "0.31"
 # `staging`: `ext_data_control_v1` (the session-clipboard protocol) ships in the staging set.
 wayland-protocols = { version = "0.32", features = ["client", "staging"] }