diff --git a/artiq/firmware/runtime/Cargo.lock b/artiq/firmware/Cargo.lock
similarity index 82%
rename from artiq/firmware/runtime/Cargo.lock
rename to artiq/firmware/Cargo.lock
index bd44fd6fb..dba7c50be 100644
--- a/artiq/firmware/runtime/Cargo.lock
+++ b/artiq/firmware/Cargo.lock
@@ -1,21 +1,15 @@
 [root]
-name = "runtime"
+name = "std_artiq"
 version = "0.0.0"
-dependencies = [
- "bsp 0.0.0",
- "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "fringe 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "log_buffer 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lwip 0.0.0",
- "std_artiq 0.0.0",
- "walkdir 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "alloc_artiq"
 version = "0.0.0"
 
+[[package]]
+name = "alloc_none"
+version = "0.0.0"
+
 [[package]]
 name = "bsp"
 version = "0.0.0"
@@ -30,7 +24,7 @@ name = "fringe"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -42,9 +36,19 @@ dependencies = [
  "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "ksupport"
+version = "0.0.0"
+dependencies = [
+ "alloc_none 0.0.0",
+ "bsp 0.0.0",
+ "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "std_artiq 0.0.0",
+]
+
 [[package]]
 name = "libc"
-version = "0.2.15"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -70,15 +74,23 @@ name = "lwip-sys"
 version = "0.0.0"
 
 [[package]]
-name = "std_artiq"
+name = "runtime"
 version = "0.0.0"
 dependencies = [
  "alloc_artiq 0.0.0",
+ "bsp 0.0.0",
+ "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fringe 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log_buffer 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lwip 0.0.0",
+ "std_artiq 0.0.0",
+ "walkdir 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "walkdir"
-version = "0.1.8"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -99,9 +111,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0fc10e8cc6b2580fda3f36eb6dc5316657f812a3df879a44a66fc9f0fdbc4855"
 "checksum fringe 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "987689dcfad85eee8d76b477865641ec483e63fb86d52966bfc350c4a647d78a"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum libc 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)" = "23e3757828fa702a20072c37ff47938e9dd331b92fac6e223d26d4b7a55f7ee2"
+"checksum libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "a51822fc847e7a8101514d1d44e354ba2ffa7d4c194dcab48870740e327cac70"
 "checksum log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ab83497bf8bf4ed2a74259c1c802351fcd67a65baa86394b6ba73c36f4838054"
 "checksum log_buffer 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ec57723b84bbe7bdf76aa93169c9b59e67473317c6de3a83cb2a0f8ccb2aa493"
-"checksum walkdir 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "c66c0b9792f0a765345452775f3adbd28dde9d33f30d13e5dcc5ae17cf6f3780"
+"checksum walkdir 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "dd7c16466ecc507c7cb5988db03e6eab4aaeab89a5c37a29251fcfd3ac9b7afe"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
diff --git a/artiq/firmware/liballoc_none/Cargo.toml b/artiq/firmware/liballoc_none/Cargo.toml
new file mode 100644
index 000000000..3cabb1f60
--- /dev/null
+++ b/artiq/firmware/liballoc_none/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+authors = ["M-Labs"]
+name = "alloc_none"
+version = "0.0.0"
+
+[lib]
+name = "alloc_none"
+path = "lib.rs"
diff --git a/artiq/firmware/liballoc_none/lib.rs b/artiq/firmware/liballoc_none/lib.rs
new file mode 100644
index 000000000..f321c49a8
--- /dev/null
+++ b/artiq/firmware/liballoc_none/lib.rs
@@ -0,0 +1,36 @@
+#![feature(allocator)]
+#![no_std]
+#![allocator]
+
+#[no_mangle]
+pub extern "C" fn __rust_allocate(_size: usize, _align: usize) -> *mut u8 {
+    unimplemented!()
+}
+
+#[no_mangle]
+pub extern "C" fn __rust_deallocate(_ptr: *mut u8, _old_size: usize, _align: usize) {
+    unimplemented!()
+}
+
+#[no_mangle]
+pub extern "C" fn __rust_reallocate(_ptr: *mut u8,
+                                    _old_size: usize,
+                                    _size: usize,
+                                    _align: usize)
+                                    -> *mut u8 {
+    unimplemented!()
+}
+
+#[no_mangle]
+pub extern "C" fn __rust_reallocate_inplace(_ptr: *mut u8,
+                                            _old_size: usize,
+                                            _size: usize,
+                                            _align: usize)
+                                            -> usize {
+    unimplemented!()
+}
+
+#[no_mangle]
+pub extern "C" fn __rust_usable_size(_size: usize, _align: usize) -> usize {
+    unimplemented!()
+}
diff --git a/artiq/firmware/libksupport/Cargo.lock b/artiq/firmware/libksupport/Cargo.lock
deleted file mode 100644
index d5a6cd619..000000000
--- a/artiq/firmware/libksupport/Cargo.lock
+++ /dev/null
@@ -1,31 +0,0 @@
-[root]
-name = "ksupport"
-version = "0.0.0"
-dependencies = [
- "bsp 0.0.0",
- "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "std_artiq 0.0.0",
-]
-
-[[package]]
-name = "alloc_artiq"
-version = "0.0.0"
-
-[[package]]
-name = "bsp"
-version = "0.0.0"
-
-[[package]]
-name = "byteorder"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "std_artiq"
-version = "0.0.0"
-dependencies = [
- "alloc_artiq 0.0.0",
-]
-
-[metadata]
-"checksum byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0fc10e8cc6b2580fda3f36eb6dc5316657f812a3df879a44a66fc9f0fdbc4855"
diff --git a/artiq/firmware/libksupport/Cargo.toml b/artiq/firmware/libksupport/Cargo.toml
index b7179fc6f..581dee017 100644
--- a/artiq/firmware/libksupport/Cargo.toml
+++ b/artiq/firmware/libksupport/Cargo.toml
@@ -9,6 +9,7 @@ path = "lib.rs"
 crate-type = ["staticlib"]
 
 [dependencies]
+alloc_none = { path = "../liballoc_none" }
 std_artiq = { path = "../libstd_artiq" }
 bsp = { path = "../libbsp" }
 byteorder = { version = "0.5", default-features = false }
diff --git a/artiq/firmware/libksupport/lib.rs b/artiq/firmware/libksupport/lib.rs
index b38ab0808..93306e565 100644
--- a/artiq/firmware/libksupport/lib.rs
+++ b/artiq/firmware/libksupport/lib.rs
@@ -3,6 +3,7 @@
 #![no_std]
 #![needs_panic_runtime]
 
+extern crate alloc_none;
 #[macro_use]
 extern crate std_artiq as std;
 extern crate libc;
@@ -60,21 +61,6 @@ use libc::{c_char, size_t};
 use kernel_proto::*;
 use dyld::Library;
 
-#[no_mangle]
-pub extern "C" fn malloc(_size: usize) -> *mut libc::c_void {
-    unimplemented!()
-}
-
-#[no_mangle]
-pub extern "C" fn realloc(_ptr: *mut libc::c_void, _size: usize) -> *mut libc::c_void {
-    unimplemented!()
-}
-
-#[no_mangle]
-pub extern "C" fn free(_ptr: *mut libc::c_void) {
-    unimplemented!()
-}
-
 fn send(request: &Message) {
     unsafe { mailbox::send(request as *const _ as usize) }
     while !mailbox::acknowledged() {}
diff --git a/artiq/firmware/libstd_artiq/Cargo.toml b/artiq/firmware/libstd_artiq/Cargo.toml
index a4467683f..dde6f0560 100644
--- a/artiq/firmware/libstd_artiq/Cargo.toml
+++ b/artiq/firmware/libstd_artiq/Cargo.toml
@@ -7,8 +7,5 @@ version = "0.0.0"
 name = "std_artiq"
 path = "lib.rs"
 
-[dependencies]
-alloc_artiq = { path = "../liballoc_artiq" }
-
 [features]
 alloc = []
diff --git a/artiq/firmware/libstd_artiq/lib.rs b/artiq/firmware/libstd_artiq/lib.rs
index 22f55ee25..3a7f66404 100644
--- a/artiq/firmware/libstd_artiq/lib.rs
+++ b/artiq/firmware/libstd_artiq/lib.rs
@@ -5,7 +5,6 @@
 #![needs_panic_runtime]
 
 extern crate std_unicode;
-extern crate alloc_artiq;
 extern crate alloc;
 #[macro_use]
 #[macro_reexport(vec, format)]
diff --git a/artiq/firmware/runtime/Cargo.toml b/artiq/firmware/runtime/Cargo.toml
index d06060233..1fe70abe9 100644
--- a/artiq/firmware/runtime/Cargo.toml
+++ b/artiq/firmware/runtime/Cargo.toml
@@ -13,6 +13,7 @@ crate-type = ["staticlib"]
 path = "lib.rs"
 
 [dependencies]
+alloc_artiq = { path = "../liballoc_artiq" }
 std_artiq = { path = "../libstd_artiq", features = ["alloc"] }
 lwip = { path = "../liblwip", default-features = false }
 bsp = { path = "../libbsp" }
diff --git a/artiq/firmware/runtime/lib.rs b/artiq/firmware/runtime/lib.rs
index ee0aa7a5b..38be35401 100644
--- a/artiq/firmware/runtime/lib.rs
+++ b/artiq/firmware/runtime/lib.rs
@@ -1,6 +1,7 @@
 #![no_std]
 #![feature(libc, const_fn, stmt_expr_attributes, repr_simd, asm, lang_items)]
 
+extern crate alloc_artiq;
 #[macro_use]
 extern crate std_artiq as std;
 extern crate libc;