diff --git a/rost_bootloader/Cargo.lock b/rost_bootloader/Cargo.lock
index 62e98be..f558873 100644
--- a/rost_bootloader/Cargo.lock
+++ b/rost_bootloader/Cargo.lock
@@ -14,7 +14,6 @@ version = "0.2.0-alpha-001"
 dependencies = [
  "fixedvec 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "os_bootinfo 0.2.0-alpha-009 (registry+https://github.com/rust-lang/crates.io-index)",
- "rlibc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "spin 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "usize_conversions 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "x86_64 0.2.0-alpha-014 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -87,11 +86,6 @@ dependencies = [
  "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "rlibc"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "skeptic"
 version = "0.5.0"
@@ -180,7 +174,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum pulldown-cmark 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8361e81576d2e02643b04950e487ec172b687180da65c731c03cf336784e6c07"
 "checksum rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eba5f8cb59cc50ed56be8880a5c7b496bfd9bd26394e176bc67884094145c2c5"
 "checksum remove_dir_all 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "dfc5b3ce5d5ea144bb04ebd093a9e14e9765bcfec866aecda9b6dec43b3d1e24"
-"checksum rlibc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc874b127765f014d792f16763a81245ab80500e2ad921ed4ee9e82481ee08fe"
 "checksum skeptic 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "061203a849117b0f7090baf8157aa91dac30545208fbb85166ac58b4ca33d89c"
 "checksum spin 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "dc28a8d2f2efa706fc9d3d074e265c1d529db41c1603679861662cb88e05e70a"
 "checksum tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "15f2b5fb00ccdf689e0149d1b1b3c03fead81c2b37735d812fa8bddbbf41b6d8"
diff --git a/rost_bootloader/Cargo.toml b/rost_bootloader/Cargo.toml
index bb457ac..9be7807 100644
--- a/rost_bootloader/Cargo.toml
+++ b/rost_bootloader/Cargo.toml
@@ -6,7 +6,6 @@ license = "MIT/Apache-2.0"
 description = "An experimental pure-Rust x86 bootloader."
 
 [dependencies]
-rlibc = "1"
 xmas-elf = "0.6.2"
 x86_64 = "0.2.0-alpha-001"
 usize_conversions = "0.2.0"
diff --git a/rost_bootloader/Xargo.toml b/rost_bootloader/Xargo.toml
new file mode 100644
index 0000000..5be4b76
--- /dev/null
+++ b/rost_bootloader/Xargo.toml
@@ -0,0 +1,6 @@
+[dependencies.core]
+stage = 0
+
+[dependencies.compiler_builtins]
+features = ["mem"]
+stage = 1
diff --git a/rost_bootloader/src/main.rs b/rost_bootloader/src/main.rs
index b4009c8..7beaf10 100644
--- a/rost_bootloader/src/main.rs
+++ b/rost_bootloader/src/main.rs
@@ -12,7 +12,6 @@
 #![no_std]
 #![no_main]
 
-extern crate rlibc;
 extern crate xmas_elf;
 extern crate x86_64;
 extern crate usize_conversions;