diff --git a/samply-mac-preload/Cargo.toml b/samply-mac-preload/Cargo.toml
index 7b4deab7..87595aa7 100644
--- a/samply-mac-preload/Cargo.toml
+++ b/samply-mac-preload/Cargo.toml
@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 # This crate is not part of the samply workspace.
 
 [lib]
-crate_type = ["cdylib"]
+crate-type = ["cdylib"]
 
 [profile.dev]
 panic = "abort"
diff --git a/samply-mac-preload/binaries/libsamply_mac_preload.dylib b/samply-mac-preload/binaries/libsamply_mac_preload.dylib
index 7a881520..0c1fc394 100755
Binary files a/samply-mac-preload/binaries/libsamply_mac_preload.dylib and b/samply-mac-preload/binaries/libsamply_mac_preload.dylib differ
diff --git a/samply-mac-preload/binaries/libsamply_mac_preload_arm64.dylib b/samply-mac-preload/binaries/libsamply_mac_preload_arm64.dylib
index 75e1f326..efa29040 100755
Binary files a/samply-mac-preload/binaries/libsamply_mac_preload_arm64.dylib and b/samply-mac-preload/binaries/libsamply_mac_preload_arm64.dylib differ
diff --git a/samply-mac-preload/binaries/libsamply_mac_preload_arm64e.dylib b/samply-mac-preload/binaries/libsamply_mac_preload_arm64e.dylib
new file mode 100755
index 00000000..500af622
Binary files /dev/null and b/samply-mac-preload/binaries/libsamply_mac_preload_arm64e.dylib differ
diff --git a/samply-mac-preload/binaries/libsamply_mac_preload_x86_64.dylib b/samply-mac-preload/binaries/libsamply_mac_preload_x86_64.dylib
index 89bce091..646f38df 100755
Binary files a/samply-mac-preload/binaries/libsamply_mac_preload_x86_64.dylib and b/samply-mac-preload/binaries/libsamply_mac_preload_x86_64.dylib differ
diff --git a/samply-mac-preload/build.sh b/samply-mac-preload/build.sh
index 7ef2f77d..2612e3d6 100755
--- a/samply-mac-preload/build.sh
+++ b/samply-mac-preload/build.sh
@@ -1,9 +1,9 @@
 export SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
-MACOSX_DEPLOYMENT_TARGET=10.7 cargo build --release --target=x86_64-apple-darwin
+MACOSX_DEPLOYMENT_TARGET=10.12 cargo build --release --target=x86_64-apple-darwin
 mv target/x86_64-apple-darwin/release/libsamply_mac_preload.dylib binaries/libsamply_mac_preload_x86_64.dylib
 MACOSX_DEPLOYMENT_TARGET=11.0 cargo build --release --target=aarch64-apple-darwin
 mv target/aarch64-apple-darwin/release/libsamply_mac_preload.dylib binaries/libsamply_mac_preload_arm64.dylib
-MACOSX_DEPLOYMENT_TARGET=11.0 RUSTC_BOOTSTRAP=1 cargo build --release --target=arm64e-apple-darwin -Zbuild-std
+MACOSX_DEPLOYMENT_TARGET=11.0 RUSTC_BOOTSTRAP=1 cargo build --release --target=arm64e-apple-darwin -Zbuild-std=core
 mv target/arm64e-apple-darwin/release/libsamply_mac_preload.dylib binaries/libsamply_mac_preload_arm64e.dylib
 lipo binaries/libsamply_mac_preload_* -create -output binaries/libsamply_mac_preload.dylib
 gzip -cvf binaries/libsamply_mac_preload.dylib > ../samply/resources/libsamply_mac_preload.dylib.gz
diff --git a/samply-mac-preload/src/mach_ipc.rs b/samply-mac-preload/src/mach_ipc.rs
index 3da151bc..abde1d1a 100644
--- a/samply-mac-preload/src/mach_ipc.rs
+++ b/samply-mac-preload/src/mach_ipc.rs
@@ -441,18 +441,6 @@ impl OsIpcChannel {
     }
 }
 
-#[derive(PartialEq, Eq, Debug)]
-pub struct OsOpaqueIpcChannel {
-    port: mach_port_t,
-}
-
-impl Drop for OsOpaqueIpcChannel {
-    fn drop(&mut self) {
-        // Make sure we don't leak!
-        debug_assert!(self.port == MACH_PORT_NULL);
-    }
-}
-
 unsafe fn setup_receive_buffer(buffer: &mut [u8], port_name: mach_port_t) {
     let message = &buffer[0] as *const u8 as *mut mach_msg_header_t;
     (*message).msgh_local_port = port_name;
diff --git a/samply/resources/libsamply_mac_preload.dylib.gz b/samply/resources/libsamply_mac_preload.dylib.gz
index 0032c3f1..e8085588 100644
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