diff --git a/deps/Cargo.toml b/deps/Cargo.toml
index a2a004a85..4362ed8e2 100644
--- a/deps/Cargo.toml
+++ b/deps/Cargo.toml
@@ -6,12 +6,12 @@ version = "0.0.0"
 name = "null"
 
 [dependencies]
-libc = "0.1.7"
+libc = "0.1.8"
 getopts = "0.2.11"
 num_cpus = "*"
 rand = "0.3.8"
-regex = "0.1.33"
+regex = "0.1.38"
 rust-crypto = "0.2.31"
-rustc-serialize = "0.3.13"
-time = "0.1.25"
+rustc-serialize = "0.3.15"
+time = "0.1.26"
 unicode-width = "0.1.1"
diff --git a/src/chmod/chmod.rs b/src/chmod/chmod.rs
index 8f6c1daea..269093d2d 100644
--- a/src/chmod/chmod.rs
+++ b/src/chmod/chmod.rs
@@ -12,8 +12,10 @@
 
 #![allow(unused_variables)]  // only necessary while the TODOs still exist
 
+extern crate aho_corasick;
 extern crate getopts;
 extern crate libc;
+extern crate memchr;
 extern crate regex;
 extern crate regex_syntax;
 
diff --git a/src/chmod/deps.mk b/src/chmod/deps.mk
index 698054a2e..78a05f8b6 100644
--- a/src/chmod/deps.mk
+++ b/src/chmod/deps.mk
@@ -1 +1 @@
-DEPLIBS += regex regex-syntax
+DEPLIBS += aho-corasick memchr regex regex-syntax
diff --git a/src/cut/cut.rs b/src/cut/cut.rs
index 723802725..5ced084a7 100644
--- a/src/cut/cut.rs
+++ b/src/cut/cut.rs
@@ -1,5 +1,5 @@
 #![crate_name = "cut"]
-#![feature(collections, path_ext)]
+#![feature(path_ext, slice_position_elem)]
 
 /*
  * This file is part of the uutils coreutils package.
diff --git a/src/du/du.rs b/src/du/du.rs
index ddea33d5c..ca8072ed9 100644
--- a/src/du/du.rs
+++ b/src/du/du.rs
@@ -1,5 +1,5 @@
 #![crate_name = "du"]
-#![feature(fs_time, metadata_ext, std_misc)]
+#![feature(future)]
 
 /*
  * This file is part of the uutils coreutils package.
@@ -57,11 +57,11 @@ impl Stat {
             path: path.clone(),
             is_dir: metadata.is_dir(),
             size: metadata.len(),
-            blocks: metadata.as_raw().blocks() as u64,
-            nlink: metadata.as_raw().nlink() as u64,
-            created: metadata.modified(),
-            accessed: metadata.accessed(),
-            modified: metadata.modified()
+            blocks: metadata.blocks() as u64,
+            nlink: metadata.nlink() as u64,
+            created: metadata.mtime() as u64,
+            accessed: metadata.atime() as u64,
+            modified: metadata.mtime() as u64
         }
     }
 }
diff --git a/src/fmt/fmt.rs b/src/fmt/fmt.rs
index 19a6b4a84..a665ae7b4 100644
--- a/src/fmt/fmt.rs
+++ b/src/fmt/fmt.rs
@@ -1,5 +1,5 @@
 #![crate_name = "fmt"]
-#![feature(core, str_char, unicode)]
+#![feature(iter_cmp, str_char, unicode)]
 
 /*
  * This file is part of `fmt` from the uutils coreutils package.
diff --git a/src/fold/fold.rs b/src/fold/fold.rs
index b69007081..f1920dc44 100644
--- a/src/fold/fold.rs
+++ b/src/fold/fold.rs
@@ -1,5 +1,5 @@
 #![crate_name = "fold"]
-#![feature(collections)]
+#![feature(slice_chars)]
 
 /*
  * This file is part of the uutils coreutils package.
diff --git a/src/hostname/hostname.rs b/src/hostname/hostname.rs
index 18f330bc8..a890549cd 100644
--- a/src/hostname/hostname.rs
+++ b/src/hostname/hostname.rs
@@ -1,5 +1,5 @@
 #![crate_name = "hostname"]
-#![feature(collections)]
+#![feature(slice_extras)]
 
 /*
  * This file is part of the uutils coreutils package.
diff --git a/src/mv/mv.rs b/src/mv/mv.rs
index 607edf7c0..cabb0ec0a 100644
--- a/src/mv/mv.rs
+++ b/src/mv/mv.rs
@@ -1,5 +1,5 @@
 #![crate_name = "mv"]
-#![feature(collections, fs_time, path_ext, slice_patterns, str_char)]
+#![feature(path_ext, slice_extras, slice_patterns, str_char)]
 #![allow(deprecated)]
 
 /*
@@ -17,6 +17,7 @@ extern crate libc;
 
 use std::fs::{self, PathExt};
 use std::io::{BufRead, BufReader, Result, stdin, Write};
+use std::os::unix::fs::MetadataExt;
 use std::path::PathBuf;
 
 #[path = "../common/util.rs"]
@@ -287,7 +288,7 @@ fn rename(from: &PathBuf, to: &PathBuf, b: &Behaviour) -> Result<()> {
         }
 
         if b.update {
-            if try!(fs::metadata(from)).modified() <= try!(fs::metadata(to)).modified() {
+            if try!(fs::metadata(from)).mtime() <= try!(fs::metadata(to)).mtime() {
                 return Ok(());
             }
         }
diff --git a/src/nl/deps.mk b/src/nl/deps.mk
index 698054a2e..78a05f8b6 100644
--- a/src/nl/deps.mk
+++ b/src/nl/deps.mk
@@ -1 +1 @@
-DEPLIBS += regex regex-syntax
+DEPLIBS += aho-corasick memchr regex regex-syntax
diff --git a/src/nl/helper.rs b/src/nl/helper.rs
index a24de9dd0..acec13470 100644
--- a/src/nl/helper.rs
+++ b/src/nl/helper.rs
@@ -11,11 +11,11 @@ fn parse_style(chars: &[char]) -> Result<::NumberingStyle, String> {
             let s: String = rest.iter().map(|c| *c).collect();
             match regex::Regex::new(&s) {
                 Ok(re) => Ok(::NumberingStyle::NumberForRegularExpression(re)),
-                Err(_) => Err(String::from_str("Illegal regular expression")),
+                Err(_) => Err(String::from("Illegal regular expression")),
             }
         }
         _ => {
-            Err(String::from_str("Illegal style encountered"))
+            Err(String::from("Illegal style encountered"))
         },
     }
 }
@@ -36,7 +36,7 @@ pub fn parse_options(settings: &mut ::Settings, opts: &getopts::Matches) -> Vec<
             "ln" => { settings.number_format = ::NumberFormat::Left; },
             "rn" => { settings.number_format = ::NumberFormat::Right; },
             "rz" => { settings.number_format = ::NumberFormat::RightZero; },
-            _ => { errs.push(String::from_str("Illegal value for -n")); },
+            _ => { errs.push(String::from("Illegal value for -n")); },
         }
     }
     match opts.opt_str("b") {
@@ -75,7 +75,7 @@ pub fn parse_options(settings: &mut ::Settings, opts: &getopts::Matches) -> Vec<
             let conv: Option<u64> = val.parse().ok();
             match conv {
               None => {
-                  errs.push(String::from_str("Illegal value for -i"));
+                  errs.push(String::from("Illegal value for -i"));
               }
               Some(num) => { settings.line_increment = num }
             }
@@ -87,7 +87,7 @@ pub fn parse_options(settings: &mut ::Settings, opts: &getopts::Matches) -> Vec<
             let conv: Option<usize> = val.parse().ok();
             match conv {
               None => {
-                  errs.push(String::from_str("Illegal value for -w"));
+                  errs.push(String::from("Illegal value for -w"));
               }
               Some(num) => { settings.number_width = num }
             }
@@ -99,7 +99,7 @@ pub fn parse_options(settings: &mut ::Settings, opts: &getopts::Matches) -> Vec<
             let conv: Option<u64> = val.parse().ok();
             match conv {
               None => {
-                  errs.push(String::from_str("Illegal value for -v"));
+                  errs.push(String::from("Illegal value for -v"));
               }
               Some(num) => { settings.starting_line_number = num }
             }
@@ -111,7 +111,7 @@ pub fn parse_options(settings: &mut ::Settings, opts: &getopts::Matches) -> Vec<
             let conv: Option<u64> = val.parse().ok();
             match conv {
               None => {
-                  errs.push(String::from_str("Illegal value for -l"));
+                  errs.push(String::from("Illegal value for -l"));
               }
               Some(num) => { settings.join_blank_lines = num }
             }
diff --git a/src/nl/nl.rs b/src/nl/nl.rs
index a222d757d..f1f2fa6b6 100644
--- a/src/nl/nl.rs
+++ b/src/nl/nl.rs
@@ -1,5 +1,5 @@
 #![crate_name = "nl"]
-#![feature(collections, slice_patterns)]
+#![feature(slice_patterns)]
 
 /*
  * This file is part of the uutils coreutils package.
@@ -11,7 +11,9 @@
  *
  */
 
+extern crate aho_corasick;
 extern crate getopts;
+extern crate memchr;
 extern crate regex_syntax;
 extern crate regex;
 
@@ -102,7 +104,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
         number_width: 6,
         number_format: NumberFormat::Right,
         renumber: true,
-        number_separator: String::from_str("\t"),
+        number_separator: String::from("\t"),
     };
 
     let given_options = match opts.parse(&args[1..]) {
diff --git a/src/ptx/deps.mk b/src/ptx/deps.mk
index 698054a2e..78a05f8b6 100644
--- a/src/ptx/deps.mk
+++ b/src/ptx/deps.mk
@@ -1 +1 @@
-DEPLIBS += regex regex-syntax
+DEPLIBS += aho-corasick memchr regex regex-syntax
diff --git a/src/ptx/ptx.rs b/src/ptx/ptx.rs
index 28204ffce..ca6bd0f99 100644
--- a/src/ptx/ptx.rs
+++ b/src/ptx/ptx.rs
@@ -1,5 +1,5 @@
 #![crate_name = "ptx"]
-#![feature(convert, collections)]
+#![feature(convert, slice_chars, vec_push_all)]
 
 /*
  * This file is part of the uutils coreutils package.
@@ -9,7 +9,10 @@
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
+
+extern crate aho_corasick;
 extern crate getopts;
+extern crate memchr;
 extern crate regex_syntax;
 extern crate regex;
  
diff --git a/src/readlink/readlink.rs b/src/readlink/readlink.rs
index f5b09f21e..352800eb4 100644
--- a/src/readlink/readlink.rs
+++ b/src/readlink/readlink.rs
@@ -1,5 +1,4 @@
 #![crate_name = "readlink"]
-#![feature(file_type)]
 
 /*
  * This file is part of the uutils coreutils package.
diff --git a/src/realpath/realpath.rs b/src/realpath/realpath.rs
index 299e746d2..3d454edd2 100644
--- a/src/realpath/realpath.rs
+++ b/src/realpath/realpath.rs
@@ -1,5 +1,5 @@
 #![crate_name= "realpath"]
-#![feature(file_type, path_ext)]
+#![feature(path_ext)]
 
 /*
  * This file is part of the uutils coreutils package.
diff --git a/src/rm/rm.rs b/src/rm/rm.rs
index ada5cf848..5a6b16b78 100644
--- a/src/rm/rm.rs
+++ b/src/rm/rm.rs
@@ -1,5 +1,5 @@
 #![crate_name = "rm"]
-#![feature(file_type, dir_entry_ext, path_ext)]
+#![feature(path_ext)]
 
 /*
  * This file is part of the uutils coreutils package.
diff --git a/src/split/deps.mk b/src/split/deps.mk
index 40f6c5135..62b0140cc 100644
--- a/src/split/deps.mk
+++ b/src/split/deps.mk
@@ -1 +1 @@
-DEPLIBS += rand regex regex-syntax
+DEPLIBS += aho-corasick memchr rand regex regex-syntax
diff --git a/test/split.rs b/test/split.rs
index 2af788078..6f533b5fc 100644
--- a/test/split.rs
+++ b/test/split.rs
@@ -1,4 +1,6 @@
 extern crate libc;
+extern crate memchr;
+extern crate aho_corasick;
 extern crate rand;
 extern crate regex_syntax;
 extern crate regex;