diff --git a/Cargo.toml b/Cargo.toml
index e746c5752..93ac9659c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,85 +4,86 @@ version = "0.0.1"
 authors = []
 build = "build.rs"
 
-
 [features]
-default = ["all"]
-all = [
-    "base64",
-    "basename",
-    "cat",
-    "chmod",
-    "chroot",
-    "cksum",
-    "comm",
-    "cp",
-    "cut",
-    "dirname",
-    "du",
-    "echo",
-    "env",
-    "expand",
-    "expr",
-    "factor",
-    "false",
-    "fmt",
-    "fold",
-    "groups",
-    "hashsum",
-    "head",
-    "hostid",
-    "hostname",
-    "id",
-    "kill",
-    "link",
-    "ln",
-    "logname",
-    "mkdir",
-    "mkfifo",
-    "mv",
-    "nice",
-    "nl",
-    "nohup",
-    "nproc",
-    "od",
-    "paste",
-    "printenv",
-    "ptx",
-    "pwd",
-    "readlink",
-    "realpath",
-    "relpath",
-    "rm",
-    "rmdir",
-    "seq",
-    "shuf",
-    "sleep",
-    "sort",
-    "split",
-    "stdbuf",
-    "sum",
-    "sync",
-    "tac",
-    "tail",
-    "tee",
-    "test",
-    "timeout",
-    "touch",
-    "tr",
-    "true",
-    "truncate",
-    "tsort",
-    "tty",
-    "uname",
-    "unexpand",
-    "uniq",
-    "unlink",
-    "uptime",
-    "users",
-    "wc",
-    "whoami",
-    "yes",
+unix = [
+  "chroot",
+  "du",
+  "groups",
+  "hostid",
+  "hostname",
+  "id",
+  "kill",
+  "logname",
+  "mkfifo",
+  "mv",
+  "nice",
+  "nohup",
+  "stdbuf",
+  "timeout",
+  "touch",
+  "tty",
+  "uname",
+  "unlink",
+  "uptime",
+  "users",
 ]
+generic = [
+  "base64",
+  "basename",
+  "cat",
+  "chmod",
+  "cksum",
+  "comm",
+  "cp",
+  "cut",
+  "dirname",
+  "echo",
+  "env",
+  "expand",
+  "expr",
+  "factor",
+  "false",
+  "fmt",
+  "fold",
+  "hashsum",
+  "head",
+  "link",
+  "ln",
+  "mkdir",
+  "nl",
+  "nproc",
+  "od",
+  "paste",
+  "printenv",
+  "ptx",
+  "pwd",
+  "readlink",
+  "realpath",
+  "relpath",
+  "rm",
+  "rmdir",
+  "seq",
+  "shuf",
+  "sleep",
+  "sort",
+  "split",
+  "sum",
+  "sync",
+  "tac",
+  "tail",
+  "tee",
+  "test",
+  "tr",
+  "true",
+  "truncate",
+  "tsort",
+  "unexpand",
+  "uniq",
+  "wc",
+  "whoami",
+  "yes",
+]
+default = ["generic", "unix"]
 
 [dependencies]
 uucore   = { path="src/uucore" }
@@ -178,4 +179,3 @@ tempdir="*"
 [[bin]]
 name="uutils"
 path="src/uutils/uutils.rs"
-
diff --git a/build.rs b/build.rs
index 71ffd8cc1..9ce14b5a5 100644
--- a/build.rs
+++ b/build.rs
@@ -12,8 +12,7 @@ pub fn main() {
         if val == "1" && key.starts_with(feature_prefix) {
             let krate = key[feature_prefix.len()..].to_lowercase();
             match krate.as_ref() {
-            "default" => continue,
-            "all" => continue,
+            "default" | "unix" | "generic" => continue,
             _ => {},
             }
             crates.push(krate.to_string());
diff --git a/src/mkdir/mkdir.rs b/src/mkdir/mkdir.rs
index f1c4e97de..fa55bafbe 100644
--- a/src/mkdir/mkdir.rs
+++ b/src/mkdir/mkdir.rs
@@ -15,9 +15,8 @@ extern crate libc;
 #[macro_use]
 extern crate uucore;
 
-use std::ffi::CString;
 use std::fs;
-use std::io::{Error, Write};
+use std::io::Write;
 use std::path::{Path, PathBuf};
 use uucore::fs::UUPathExt;
 
@@ -137,6 +136,9 @@ fn mkdir(path: &Path, mode: u16, verbose: bool) -> i32 {
 
     #[cfg(unix)]
     fn chmod(path: &Path, mode: u16) -> i32 {
+        use std::ffi::CString;
+        use std::io::Error;
+
         let directory = CString::new(path.as_os_str().to_str().unwrap()).unwrap_or_else(|e| crash!(1, "{}", e));
         let mode = mode as libc::mode_t;
 
diff --git a/src/test/test.rs b/src/test/test.rs
index ee0303ea2..9cd3a589d 100644
--- a/src/test/test.rs
+++ b/src/test/test.rs
@@ -12,7 +12,7 @@
 extern crate libc;
 
 use std::collections::HashMap;
-use std::ffi::{CString, OsString};
+use std::ffi::OsString;
 use std::env::{args_os};
 use std::str::{from_utf8};
 
@@ -328,6 +328,8 @@ enum PathCondition {
 fn path(path: &[u8], cond: PathCondition) -> bool {
     use libc::{stat, lstat, S_IFMT, S_IFLNK, S_IFBLK, S_IFCHR, S_IFDIR, S_IFREG};
     use libc::{S_IFIFO, mode_t};
+    use std::ffi::CString;
+
     static S_ISUID: mode_t = 0o4000;
     static S_ISGID: mode_t = 0o2000;
     static S_IFSOCK: mode_t = 0o140000;
diff --git a/src/uucore/lib.rs b/src/uucore/lib.rs
index adbe7fe80..17fd1071f 100644
--- a/src/uucore/lib.rs
+++ b/src/uucore/lib.rs
@@ -4,10 +4,11 @@ extern crate time;
 #[macro_use]
 mod macros;
 
-pub mod c_types;
 pub mod fs;
 pub mod parse_time;
-pub mod process;
+
+#[cfg(unix)] pub mod c_types;
+#[cfg(unix)] pub mod process;
 #[cfg(unix)] pub mod signals;
 #[cfg(unix)] pub mod utmpx;
 
diff --git a/src/whoami/platform/windows.rs b/src/whoami/platform/windows.rs
index 0a8611952..eda1753bb 100644
--- a/src/whoami/platform/windows.rs
+++ b/src/whoami/platform/windows.rs
@@ -9,8 +9,6 @@
 
 extern crate winapi;
 extern crate advapi32;
-
-#[macro_use]
 extern crate uucore;
 
 use std::ffi::OsString;