diff --git a/src/Cargo.lock b/src/Cargo.lock
index d519522a1b0d2..fff271204ca70 100644
--- a/src/Cargo.lock
+++ b/src/Cargo.lock
@@ -775,6 +775,11 @@ dependencies = [
  "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "fs_extra"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "fst"
 version = "0.3.0"
@@ -996,6 +1001,16 @@ name = "itoa"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "jemalloc-sys"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fs_extra 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "jobserver"
 version = "0.1.11"
@@ -2181,6 +2196,7 @@ dependencies = [
  "arena 0.0.0",
  "env_logger 0.5.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "graphviz 0.0.0",
+ "jemalloc-sys 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc 0.0.0",
  "rustc-rayon 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3229,6 +3245,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
 "checksum foreign-types-shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
 "checksum fs2 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9564fc758e15025b46aa6643b1b77d047d1a56a1aea6e01002ac0c7026876213"
+"checksum fs_extra 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5f2a4a2034423744d2cc7ca2068453168dcdb82c438419e639a26bd87839c674"
 "checksum fst 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d94485a00b1827b861dd9d1a2cc9764f9044d4c535514c0760a5a2012ef3399f"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
@@ -3252,6 +3269,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum isatty 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "6c324313540cd4d7ba008d43dc6606a32a5579f13cc17b2804c13096f0a5c522"
 "checksum itertools 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)" = "f58856976b776fedd95533137617a02fb25719f40e7d9b01c7043cd65474f450"
 "checksum itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
+"checksum jemalloc-sys 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "bfc62c8e50e381768ce8ee0428ee53741929f7ebd73e4d83f669bcf7693e00ae"
 "checksum jobserver 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "60af5f849e1981434e4a31d3d782c4774ae9b434ce55b101a96ecfd09147e8be"
 "checksum json 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)" = "9ad0485404155f45cce53a40d4b2d6ac356418300daed05273d9e26f91c390be"
 "checksum jsonrpc-core 8.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ddf83704f4e79979a424d1082dd2c1e52683058056c9280efa19ac5f6bc9033c"
diff --git a/src/liballoc_jemalloc/Cargo.toml b/src/liballoc_jemalloc/Cargo.toml
index 7986d5dd2eb54..13aa7e7e7dcce 100644
--- a/src/liballoc_jemalloc/Cargo.toml
+++ b/src/liballoc_jemalloc/Cargo.toml
@@ -3,7 +3,6 @@ authors = ["The Rust Project Developers"]
 name = "alloc_jemalloc"
 version = "0.0.0"
 build = "build.rs"
-links = "jemalloc"
 
 [lib]
 name = "alloc_jemalloc"
diff --git a/src/librustc_driver/Cargo.toml b/src/librustc_driver/Cargo.toml
index 470c8b03d0bca..1565a5406ad00 100644
--- a/src/librustc_driver/Cargo.toml
+++ b/src/librustc_driver/Cargo.toml
@@ -38,3 +38,5 @@ syntax = { path = "../libsyntax" }
 smallvec = { version = "0.6.5", features = ["union"] }
 syntax_ext = { path = "../libsyntax_ext" }
 syntax_pos = { path = "../libsyntax_pos" }
+jemalloc-sys = { version = "0.1.8", features = ['unprefixed_malloc_on_supported_platforms'] }
+
diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs
index 276b7290c2ef0..2de2473f694be 100644
--- a/src/librustc_driver/lib.rs
+++ b/src/librustc_driver/lib.rs
@@ -30,6 +30,8 @@
 
 #![recursion_limit="256"]
 
+extern crate jemalloc_sys;
+
 extern crate arena;
 pub extern crate getopts;
 extern crate graphviz;
diff --git a/src/librustc_target/spec/mod.rs b/src/librustc_target/spec/mod.rs
index 9ee4582fabf7b..05ca40aa712f7 100644
--- a/src/librustc_target/spec/mod.rs
+++ b/src/librustc_target/spec/mod.rs
@@ -1272,7 +1272,8 @@ impl ToJson for Target {
 
 fn maybe_jemalloc() -> Option<String> {
     if cfg!(feature = "jemalloc") {
-        Some("alloc_jemalloc".to_string())
+        None
+        // Some("alloc_jemalloc".to_string())
     } else {
         None
     }