diff --git a/Makefile.in b/Makefile.in
index cda3e7a..683cf41 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -9,7 +9,7 @@ RUST_SRC=$(shell find $(VPATH)/. -type f -name '*.rs')
 all:    libcore_foundation.dummy
 
 libcore_foundation.dummy: lib.rs $(RUST_SRC)
-	$(RUSTC) $(RUSTFLAGS) $< --lib --out-dir .
+	$(RUSTC) $(RUSTFLAGS) $< --crate-type=lib --out-dir .
 	touch $@
 
 core_foundation-test: lib.rs $(RUST_SRC)
diff --git a/base.rs b/base.rs
index d42e2a2..f7f20a4 100644
--- a/base.rs
+++ b/base.rs
@@ -9,6 +9,7 @@
 
 use std::cast;
 use std::libc::{c_long, c_ulong};
+use std::num::Bounded;
 
 pub type Boolean = u8;
 
diff --git a/lib.rs b/lib.rs
index d422295..57b9f81 100644
--- a/lib.rs
+++ b/lib.rs
@@ -9,7 +9,7 @@
 
 #[crate_id = "github.com/mozilla-servo/rust-core-foundation#core_foundation:0.1"];
 
-extern mod std;
+extern crate std;
 
 pub mod array;
 pub mod base;
diff --git a/string.rs b/string.rs
index 69ff0e3..7babf2a 100644
--- a/string.rs
+++ b/string.rs
@@ -15,6 +15,7 @@ use base::{Boolean, CFAllocatorRef, CFIndex, CFIndexConvertible, CFOptionFlags,
 use base::{CFRelease, CFTypeID, TCFType, kCFAllocatorDefault, kCFAllocatorNull};
 
 use std::cast;
+use std::fmt;
 use std::libc;
 use std::ptr;
 use std::vec;
@@ -259,8 +260,8 @@ impl FromStr for CFString {
     }
 }
 
-impl ToStr for CFString {
-    fn to_str(&self) -> ~str {
+impl fmt::Show for CFString {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         unsafe {
             let char_len = self.char_len();
             let range = CFRange::init(0, char_len);
@@ -294,11 +295,14 @@ impl ToStr for CFString {
             assert!(bytes_used == buffer.len().to_CFIndex());
 
             // Then, reinterpret it as as string. You have been warned!
-            cast::transmute(buffer)
+            let s: ~str = cast::transmute(buffer);
+
+            write!(f.buf, "{}", s)
         }
     }
 }
 
+
 impl CFString {
     /// Like `CFString::from_string`, but references a string that can be used as a backing store
     /// by virtue of being statically allocated.
diff --git a/url.rs b/url.rs
index b8d2704..1fc04ec 100644
--- a/url.rs
+++ b/url.rs
@@ -12,6 +12,7 @@
 #[allow(non_uppercase_statics)];
 
 use base::{CFOptionFlags, CFRelease, CFTypeID, TCFType};
+use std::fmt;
 use string::{CFString, CFStringRef};
 
 struct __CFURL;
@@ -49,12 +50,13 @@ impl TCFType<CFURLRef> for CFURL {
     }
 }
 
-impl ToStr for CFURL {
+impl fmt::Show for CFURL {
     #[inline]
-    fn to_str(&self) -> ~str {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         unsafe {
             let string: CFString = TCFType::wrap_under_get_rule(CFURLGetString(self.obj));
-            string.to_str()
+            let s: ~str = string.to_str();
+            write!(f.buf, "{}", s)
         }
     }
 }