diff --git a/src/fcntl.rs b/src/fcntl.rs
index 785096e7fa..2e2d8aa212 100644
--- a/src/fcntl.rs
+++ b/src/fcntl.rs
@@ -19,7 +19,7 @@ mod ffi {
         use libc::{c_int, c_short, off_t, pid_t};
 
         #[repr(C)]
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         pub struct flock {
             pub l_type: c_short,
             pub l_whence: c_short,
@@ -47,7 +47,7 @@ mod ffi {
         use libc::{c_int, c_short, off_t, pid_t};
 
         #[repr(C)]
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         pub struct flock {
             pub l_start: off_t,
             pub l_len: off_t,
diff --git a/src/sched.rs b/src/sched.rs
index 4b6c955f88..c1746f2e1b 100644
--- a/src/sched.rs
+++ b/src/sched.rs
@@ -89,7 +89,7 @@ pub type CpuMask = c_ulong;
 
 // Structure representing the CPU set to apply
 #[repr(C)]
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 pub struct CpuSet {
     cpu_mask: [CpuMask; cpuset_attribs::CPU_SETSIZE/cpuset_attribs::CPU_MASK_BITS]
 }
diff --git a/src/sys/epoll.rs b/src/sys/epoll.rs
index a68a7b6f8f..1028af78f6 100644
--- a/src/sys/epoll.rs
+++ b/src/sys/epoll.rs
@@ -70,7 +70,7 @@ impl fmt::Debug for EpollEventKind {
     }
 }
 
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 #[repr(C)]
 pub enum EpollOp {
     EpollCtlAdd = 1,
@@ -94,7 +94,7 @@ fn test_epoll_event_size() {
 }
 
 #[cfg(any(not(target_os = "android"), target_arch = "x86_64"))]
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 #[repr(C, packed)]
 pub struct EpollEvent {
     pub events: EpollEventKind,
diff --git a/src/sys/event.rs b/src/sys/event.rs
index 9a0ede1e0d..c2c65dad21 100644
--- a/src/sys/event.rs
+++ b/src/sys/event.rs
@@ -13,7 +13,7 @@ mod ffi {
     pub use libc::{c_int, c_void, uintptr_t, intptr_t, timespec};
     use super::{EventFilter, EventFlag, FilterFlag};
 
-    #[derive(Copy)]
+    #[derive(Clone, Copy)]
     #[repr(C)]
     pub struct kevent {
         pub ident: uintptr_t,       // 8
@@ -40,7 +40,7 @@ mod ffi {
 }
 
 #[repr(i16)]
-#[derive(Copy, Debug, PartialEq)]
+#[derive(Clone, Copy, Debug, PartialEq)]
 pub enum EventFilter {
     EVFILT_READ = -1,
     EVFILT_WRITE = -2,
diff --git a/src/sys/ioctl.rs b/src/sys/ioctl.rs
index 5003a4f682..18b8b1abe4 100644
--- a/src/sys/ioctl.rs
+++ b/src/sys/ioctl.rs
@@ -8,7 +8,7 @@ pub use self::IoctlArg::*;
 mod ffi {
     use libc::c_ushort;
 
-    #[derive(Copy, Debug)]
+    #[derive(Clone, Copy, Debug)]
     pub struct Winsize {
         pub ws_row: c_ushort,
         pub ws_col: c_ushort,
diff --git a/src/sys/signal.rs b/src/sys/signal.rs
index 5dd974cc02..afeb9c6cb5 100644
--- a/src/sys/signal.rs
+++ b/src/sys/signal.rs
@@ -96,7 +96,7 @@ pub mod signal {
     // actually a giant union. Currently we're only interested in these fields,
     // however.
     #[repr(C)]
-    #[derive(Copy)]
+    #[derive(Clone, Copy)]
     pub struct siginfo {
         si_signo: libc::c_int,
         si_errno: libc::c_int,
@@ -117,14 +117,14 @@ pub mod signal {
 
     #[repr(C)]
     #[cfg(target_pointer_width = "32")]
-    #[derive(Copy)]
+    #[derive(Clone, Copy)]
     pub struct sigset_t {
         __val: [libc::c_ulong; 32],
     }
 
     #[repr(C)]
     #[cfg(target_pointer_width = "64")]
-    #[derive(Copy)]
+    #[derive(Clone, Copy)]
     pub struct sigset_t {
         __val: [libc::c_ulong; 16],
     }
@@ -249,7 +249,7 @@ pub mod signal {
     // This structure has more fields, but we're not all that interested in
     // them.
     #[repr(C)]
-    #[derive(Copy)]
+    #[derive(Clone, Copy)]
     pub struct siginfo {
         pub si_signo: libc::c_int,
         pub si_errno: libc::c_int,
@@ -297,7 +297,7 @@ mod ffi {
     }
 }
 
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 pub struct SigSet {
     sigset: sigset_t
 }
diff --git a/src/sys/socket/addr.rs b/src/sys/socket/addr.rs
index 34028246bd..1ae5a9c3e1 100644
--- a/src/sys/socket/addr.rs
+++ b/src/sys/socket/addr.rs
@@ -275,7 +275,7 @@ impl fmt::Display for Ipv4Addr {
  *
  */
 
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 pub struct Ipv6Addr(pub libc::in6_addr);
 
 impl Ipv6Addr {
diff --git a/src/sys/socket/mod.rs b/src/sys/socket/mod.rs
index 707a2a5999..ea5c99167f 100644
--- a/src/sys/socket/mod.rs
+++ b/src/sys/socket/mod.rs
@@ -57,7 +57,7 @@ pub struct sockaddr_storage {
     pub __ss_pad2: [u8; 120],
 }
 
-#[derive(Copy, PartialEq, Eq, Debug, FromPrimitive)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug, FromPrimitive)]
 #[repr(i32)]
 pub enum SockType {
     Stream = consts::SOCK_STREAM,
@@ -248,7 +248,7 @@ pub fn sendto(fd: RawFd, buf: &[u8], addr: &SockAddr, flags: SockMessageFlags) -
 }
 
 #[repr(C)]
-#[derive(Copy, Debug)]
+#[derive(Clone, Copy, Debug)]
 pub struct linger {
     pub l_onoff: c_int,
     pub l_linger: c_int
diff --git a/src/sys/socket/multicast.rs b/src/sys/socket/multicast.rs
index f40de76240..1efac40c11 100644
--- a/src/sys/socket/multicast.rs
+++ b/src/sys/socket/multicast.rs
@@ -3,7 +3,7 @@ use libc::in_addr;
 use std::fmt;
 
 #[repr(C)]
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 pub struct ip_mreq {
     pub imr_multiaddr: in_addr,
     pub imr_interface: in_addr,
diff --git a/src/sys/socket/sockopt.rs b/src/sys/socket/sockopt.rs
index 0f6e5adcf5..dc93f08513 100644
--- a/src/sys/socket/sockopt.rs
+++ b/src/sys/socket/sockopt.rs
@@ -22,7 +22,7 @@ macro_rules! sockopt_impl {
     };
 
     ($name:ident, $flag:path, $get_ty:ty, $getter:ty, $set_ty:ty, $setter:ty) => {
-        #[derive(Copy, Debug)]
+        #[derive(Clone, Copy, Debug)]
         pub struct $name;
 
         impl<'a> SockOpt for $name {
diff --git a/src/sys/termios.rs b/src/sys/termios.rs
index c5758fe090..57612f0bf6 100644
--- a/src/sys/termios.rs
+++ b/src/sys/termios.rs
@@ -98,7 +98,7 @@ mod ffi {
         pub type speed_t = c_ulong;
 
         #[repr(C)]
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         pub struct Termios {
             pub c_iflag: InputFlags,
             pub c_oflag: OutputFlags,
@@ -224,7 +224,7 @@ mod ffi {
 
         // XXX: We're using `repr(C)` because `c_int` doesn't work here.
         // See https://github.com/rust-lang/rust/issues/10374.
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         #[repr(C)]
         pub enum SetArg {
             TCSANOW   = 0,
@@ -235,7 +235,7 @@ mod ffi {
 
         // XXX: We're using `repr(C)` because `c_int` doesn't work here.
         // See https://github.com/rust-lang/rust/issues/10374.
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         #[repr(C)]
         pub enum FlushArg {
             TCIFLUSH  = 1,
@@ -245,7 +245,7 @@ mod ffi {
 
         // XXX: We're using `repr(C)` because `c_int` doesn't work here.
         // See https://github.com/rust-lang/rust/issues/10374.
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         #[repr(C)]
         pub enum FlowArg {
             TCOOFF = 1,
@@ -264,7 +264,7 @@ mod ffi {
         pub type speed_t = c_uint;
 
         #[repr(C)]
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         pub struct Termios {
             pub c_iflag: InputFlags,
             pub c_oflag: OutputFlags,
@@ -378,7 +378,7 @@ mod ffi {
 
         // XXX: We're using `repr(C)` because `c_int` doesn't work here.
         // See https://github.com/rust-lang/rust/issues/10374.
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         #[repr(C)]
         pub enum SetArg {
             TCSANOW   = 0,
@@ -388,7 +388,7 @@ mod ffi {
 
         // XXX: We're using `repr(C)` because `c_int` doesn't work here.
         // See https://github.com/rust-lang/rust/issues/10374.
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         #[repr(C)]
         pub enum FlushArg {
             TCIFLUSH  = 0,
@@ -398,7 +398,7 @@ mod ffi {
 
         // XXX: We're using `repr(C)` because `c_int` doesn't work here.
         // See https://github.com/rust-lang/rust/issues/10374.
-        #[derive(Copy)]
+        #[derive(Clone, Copy)]
         #[repr(C)]
         pub enum FlowArg {
             TCOOFF = 0,
diff --git a/src/sys/utsname.rs b/src/sys/utsname.rs
index 69683bf6e9..2eb820f305 100644
--- a/src/sys/utsname.rs
+++ b/src/sys/utsname.rs
@@ -16,7 +16,7 @@ mod ffi {
 const UTSNAME_LEN: usize = 65;
 
 #[repr(C)]
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 pub struct UtsName {
     sysname: [c_char; UTSNAME_LEN],
     nodename: [c_char; UTSNAME_LEN],
diff --git a/src/sys/wait.rs b/src/sys/wait.rs
index 6772dd900b..a6bccd8a87 100644
--- a/src/sys/wait.rs
+++ b/src/sys/wait.rs
@@ -16,7 +16,7 @@ bitflags!(
     }
 );
 
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 pub enum WaitStatus {
     Exited(pid_t),
     StillAlive
diff --git a/src/unistd.rs b/src/unistd.rs
index 9df6cd766e..64203f0226 100644
--- a/src/unistd.rs
+++ b/src/unistd.rs
@@ -44,7 +44,7 @@ mod ffi {
     }
 }
 
-#[derive(Copy)]
+#[derive(Clone, Copy)]
 pub enum Fork {
     Parent(pid_t),
     Child
diff --git a/test/test.rs b/test/test.rs
index 7e30fb1931..be1e0ad883 100644
--- a/test/test.rs
+++ b/test/test.rs
@@ -1,5 +1,3 @@
-#![feature(convert, io_ext)]
-
 extern crate nix;
 extern crate libc;
 extern crate rand;