diff --git a/src/fcntl.rs b/src/fcntl.rs
index e4f0417b7a..5853b62f12 100644
--- a/src/fcntl.rs
+++ b/src/fcntl.rs
@@ -22,11 +22,7 @@ use std::os::unix::io::RawFd;
     all(target_os = "freebsd", target_arch = "x86_64"),
 ))]
 use std::path::PathBuf;
-#[cfg(any(
-    target_os = "android",
-    target_os = "freebsd",
-    target_os = "linux"
-))]
+#[cfg(any(linux_android, target_os = "freebsd"))]
 use std::{
     os::unix::io::{AsFd, AsRawFd},
     ptr,
@@ -36,8 +32,7 @@ use std::{
 use crate::{sys::stat::Mode, NixPath, Result};
 
 #[cfg(any(
-    target_os = "linux",
-    target_os = "android",
+    linux_android,
     target_os = "emscripten",
     target_os = "fuchsia",
     target_os = "wasi",
@@ -81,10 +76,11 @@ libc_bitflags!(
         /// Open the file in append-only mode.
         O_APPEND;
         /// Generate a signal when input or output becomes possible.
-        #[cfg(not(any(target_os = "aix",
-                      target_os = "illumos",
-                      target_os = "solaris",
-                      target_os = "haiku")))]
+        #[cfg(not(any(
+            solarish,
+            target_os = "aix",
+            target_os = "haiku"
+        )))]
         O_ASYNC;
         /// Closes the file descriptor once an `execve` call is made.
         ///
@@ -93,19 +89,18 @@ libc_bitflags!(
         /// Create the file if it does not exist.
         O_CREAT;
         /// Try to minimize cache effects of the I/O for this file.
-        #[cfg(any(target_os = "android",
-                  target_os = "dragonfly",
-                  target_os = "freebsd",
-                  target_os = "linux",
-                  target_os = "netbsd"))]
+        #[cfg(any(
+            freebsdlike,
+            linux_android,
+            target_os = "netbsd"
+        ))]
         O_DIRECT;
         /// If the specified path isn't a directory, fail.
         #[cfg(not(solarish))]
         O_DIRECTORY;
         /// Implicitly follow each `write()` with an `fdatasync()`.
-        #[cfg(any(target_os = "android",
+        #[cfg(any(linux_android,
                   apple_targets,
-                  target_os = "linux",
                   target_os = "netbsd",
                   target_os = "openbsd"))]
         O_DSYNC;
@@ -144,7 +139,7 @@ libc_bitflags!(
         /// Obtain a file descriptor for low-level access.
         ///
         /// The file itself is not opened and other file operations will fail.
-        #[cfg(any(target_os = "android", target_os = "linux", target_os = "redox"))]
+        #[cfg(any(linux_android, target_os = "redox"))]
         O_PATH;
         /// Only allow reading.
         ///
@@ -184,7 +179,7 @@ libc_bitflags!(
 /// Computes the raw fd consumed by a function of the form `*at`.
 #[cfg(any(
     all(feature = "fs", not(target_os = "redox")),
-    all(feature = "process", any(target_os = "android", target_os = "linux")),
+    all(feature = "process", linux_android),
     all(feature = "fanotify", target_os = "linux")
 ))]
 pub(crate) fn at_rawfd(fd: Option<RawFd>) -> raw::c_int {
@@ -346,8 +341,7 @@ fn inner_readlink<P: ?Sized + NixPath>(
                 )
             }
             #[cfg(not(any(
-                target_os = "android",
-                target_os = "linux",
+                linux_android,
                 target_os = "redox"
             )))]
             Some(dirfd) => super::sys::stat::fstatat(
@@ -406,7 +400,7 @@ pub fn readlinkat<P: ?Sized + NixPath>(
 }
 }
 
-#[cfg(any(target_os = "android", target_os = "linux", target_os = "freebsd"))]
+#[cfg(any(linux_android, target_os = "freebsd"))]
 #[cfg(feature = "fs")]
 libc_bitflags!(
     /// Additional flags for file sealing, which allows for limiting operations on a file.
@@ -460,14 +454,12 @@ pub enum FcntlArg<'a> {
     #[cfg(linux_android)]
     F_OFD_GETLK(&'a mut libc::flock),
     #[cfg(any(
-        target_os = "android",
-        target_os = "linux",
+        linux_android,
         target_os = "freebsd"
     ))]
     F_ADD_SEALS(SealFlag),
     #[cfg(any(
-        target_os = "android",
-        target_os = "linux",
+        linux_android,
         target_os = "freebsd"
     ))]
     F_GET_SEALS,
@@ -530,16 +522,14 @@ pub fn fcntl(fd: RawFd, arg: FcntlArg) -> Result<c_int> {
             #[cfg(linux_android)]
             F_OFD_GETLK(flock) => libc::fcntl(fd, libc::F_OFD_GETLK, flock),
             #[cfg(any(
-                target_os = "android",
-                target_os = "linux",
+                linux_android,
                 target_os = "freebsd"
             ))]
             F_ADD_SEALS(flag) => {
                 libc::fcntl(fd, libc::F_ADD_SEALS, flag.bits())
             }
             #[cfg(any(
-                target_os = "android",
-                target_os = "linux",
+                linux_android,
                 target_os = "freebsd"
             ))]
             F_GET_SEALS => libc::fcntl(fd, libc::F_GET_SEALS),
@@ -672,7 +662,7 @@ feature! {
 // Note: FreeBSD defines the offset argument as "off_t".  Linux and Android
 // define it as "loff_t".  But on both OSes, on all supported platforms, those
 // are 64 bits.  So Nix uses i64 to make the docs simple and consistent.
-#[cfg(any(target_os = "android", target_os = "freebsd", target_os = "linux"))]
+#[cfg(any(linux_android, target_os = "freebsd"))]
 pub fn copy_file_range<Fd1: AsFd, Fd2: AsFd>(
     fd_in: Fd1,
     off_in: Option<&mut i64>,
@@ -960,8 +950,7 @@ pub fn fspacectl_all(
 }
 
 #[cfg(any(
-    target_os = "linux",
-    target_os = "android",
+    linux_android,
     target_os = "emscripten",
     target_os = "fuchsia",
     target_os = "wasi",
@@ -1008,13 +997,11 @@ mod posix_fadvise {
 }
 
 #[cfg(any(
-    target_os = "linux",
-    target_os = "android",
-    target_os = "dragonfly",
+    linux_android,
+    freebsdlike,
     target_os = "emscripten",
     target_os = "fuchsia",
     target_os = "wasi",
-    target_os = "freebsd"
 ))]
 pub fn posix_fallocate(
     fd: RawFd,
diff --git a/src/features.rs b/src/features.rs
index a623d2d533..b528773d10 100644
--- a/src/features.rs
+++ b/src/features.rs
@@ -98,8 +98,7 @@ mod os {
 }
 
 #[cfg(any(
-        target_os = "dragonfly",    // Since ???
-        target_os = "freebsd",      // Since 10.0
+        freebsdlike,                // FreeBSD since 10.0 DragonFlyBSD since ???
         target_os = "illumos",      // Since ???
         target_os = "netbsd",       // Since 6.0
         target_os = "openbsd",      // Since 5.7
diff --git a/src/ifaddrs.rs b/src/ifaddrs.rs
index e90b26d012..58cbfec9eb 100644
--- a/src/ifaddrs.rs
+++ b/src/ifaddrs.rs
@@ -33,7 +33,7 @@ pub struct InterfaceAddress {
 }
 
 cfg_if! {
-    if #[cfg(any(target_os = "android", target_os = "emscripten", target_os = "fuchsia", target_os = "linux"))] {
+    if #[cfg(any(linux_android, target_os = "emscripten", target_os = "fuchsia"))] {
         fn get_ifu_from_sockaddr(info: &libc::ifaddrs) -> *const libc::sockaddr {
             info.ifa_ifu
         }
diff --git a/src/lib.rs b/src/lib.rs
index ed9d67b7fe..0d4416926f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -123,9 +123,8 @@ pub mod fcntl;
 feature! {
     #![feature = "net"]
 
-    #[cfg(any(target_os = "android",
+    #[cfg(any(linux_android,
               bsd,
-              target_os = "linux",
               target_os = "illumos"))]
     #[deny(missing_docs)]
     pub mod ifaddrs;
@@ -143,12 +142,7 @@ feature! {
     #![feature = "mount"]
     pub mod mount;
 }
-#[cfg(any(
-    target_os = "dragonfly",
-    target_os = "freebsd",
-    target_os = "linux",
-    target_os = "netbsd"
-))]
+#[cfg(any(freebsdlike, target_os = "linux", target_os = "netbsd"))]
 feature! {
     #![feature = "mqueue"]
     pub mod mqueue;
diff --git a/src/poll.rs b/src/poll.rs
index 46ee26ae09..0ad9f40d3b 100644
--- a/src/poll.rs
+++ b/src/poll.rs
@@ -224,7 +224,7 @@ feature! {
 /// so in that case `ppoll` differs from `poll` only in the precision of the
 /// timeout argument.
 ///
-#[cfg(any(target_os = "android", freebsdlike, target_os = "linux"))]
+#[cfg(any(linux_android, freebsdlike))]
 pub fn ppoll(
     fds: &mut [PollFd],
     timeout: Option<crate::sys::time::TimeSpec>,
diff --git a/src/sched.rs b/src/sched.rs
index bafbfa0bd8..d76d5581d1 100644
--- a/src/sched.rs
+++ b/src/sched.rs
@@ -152,20 +152,10 @@ mod sched_linux_like {
     }
 }
 
-#[cfg(any(
-    target_os = "android",
-    target_os = "dragonfly",
-    target_os = "freebsd",
-    target_os = "linux"
-))]
+#[cfg(any(linux_android, freebsdlike))]
 pub use self::sched_affinity::*;
 
-#[cfg(any(
-    target_os = "android",
-    target_os = "dragonfly",
-    target_os = "freebsd",
-    target_os = "linux"
-))]
+#[cfg(any(linux_android, freebsdlike))]
 mod sched_affinity {
     use crate::errno::Errno;
     use crate::unistd::Pid;
diff --git a/src/time.rs b/src/time.rs
index 6e8aac6ac1..b4b0f07eb7 100644
--- a/src/time.rs
+++ b/src/time.rs
@@ -22,11 +22,7 @@ impl ClockId {
     feature! {
     #![feature = "process"]
     /// Returns `ClockId` of a `pid` CPU-time clock
-    #[cfg(any(
-        freebsdlike,
-        linux_android,
-        target_os = "emscripten",
-    ))]
+    #[cfg(any(freebsdlike, linux_android, target_os = "emscripten"))]
     pub fn pid_cpu_clock_id(pid: Pid) -> Result<Self> {
         clock_getcpuclockid(pid)
     }