diff --git a/servo/etc/ci/buildbot_steps.yml b/servo/etc/ci/buildbot_steps.yml
index d431b95f824a6..5ca8f67822737 100644
--- a/servo/etc/ci/buildbot_steps.yml
+++ b/servo/etc/ci/buildbot_steps.yml
@@ -814,9 +814,6 @@ zlib
 lib
 /
 pkgconfig
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -826,9 +823,6 @@ build
 dev
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -837,9 +831,6 @@ test
 unit
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -849,9 +840,6 @@ package
 dev
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -1440,9 +1428,6 @@ self
 test
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -1452,9 +1437,6 @@ build
 dev
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -1463,9 +1445,6 @@ test
 compiletest
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -1474,9 +1453,6 @@ test
 unit
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -1486,9 +1462,6 @@ package
 dev
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -1497,9 +1470,6 @@ build
 cef
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -1988,9 +1958,6 @@ keep
 force
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 ANDROID_SDK
 =
 /
@@ -2019,9 +1986,6 @@ android
 dev
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 ANDROID_SDK
 =
 /
@@ -2101,9 +2065,6 @@ keep
 force
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 ANDROID_SDK
 =
 /
@@ -2132,9 +2093,6 @@ android
 release
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 ANDROID_SDK
 =
 /
@@ -2187,9 +2145,6 @@ keep
 force
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
@@ -2248,9 +2203,6 @@ keep
 force
 -
 env
-SERVO_RUSTC_LLVM_ASSERTIONS
-=
-1
 .
 /
 mach
diff --git a/servo/python/servo/bootstrap_commands.py b/servo/python/servo/bootstrap_commands.py
index 99d70cdba0ea2..997bff528fa0b 100644
--- a/servo/python/servo/bootstrap_commands.py
+++ b/servo/python/servo/bootstrap_commands.py
@@ -71,7 +71,6 @@
 util
 import
 STATIC_RUST_LANG_ORG_DIST
-URLOPEN_KWARGS
 CommandProvider
 class
 MachCommands
@@ -560,113 +559,12 @@
 =
 STATIC_RUST_LANG_ORG_DIST
             
-elif
-self
-.
-config
-[
-"
-build
-"
-]
-[
-"
-llvm
--
-assertions
-"
-]
-:
-                
-base_url
-=
-nightly_dist
-            
 else
 :
                 
-import
-toml
-                
-channel
-=
-nightly_dist
-+
-"
-/
-channel
--
-rust
--
-nightly
-.
-toml
-"
-                
-manifest
-=
-toml
-.
-load
-(
-urllib2
-.
-urlopen
-(
-channel
-*
-*
-URLOPEN_KWARGS
-)
-)
-                
-nightly_commit_hash
-=
-manifest
-[
-"
-pkg
-"
-]
-[
-"
-rustc
-"
-]
-[
-"
-git_commit_hash
-"
-]
-                
 base_url
 =
-"
-https
-:
-/
-/
-s3
-.
-amazonaws
-.
-com
-/
-rust
--
-lang
--
-ci
-/
-rustc
--
-builds
--
-alt
-/
-"
-+
-nightly_commit_hash
+nightly_dist
             
 rustc_url
 =
diff --git a/servo/python/servo/command_base.py b/servo/python/servo/command_base.py
index a4da8bcc77fb3..e7a71df1d22d8 100644
--- a/servo/python/servo/command_base.py
+++ b/servo/python/servo/command_base.py
@@ -1801,60 +1801,6 @@
 )
 )
         
-triples_with_rustc_alt_builds
-=
-[
-            
-"
-x86_64
--
-unknown
--
-linux
--
-gnu
-"
-            
-"
-x86_64
--
-apple
--
-darwin
-"
-            
-"
-x86_64
--
-pc
--
-windows
--
-msvc
-"
-        
-]
-        
-llvm_assertions_default
-=
-(
-"
-SERVO_RUSTC_LLVM_ASSERTIONS
-"
-in
-os
-.
-environ
-                                   
-or
-host_triple
-(
-)
-not
-in
-triples_with_rustc_alt_builds
-)
-        
 self
 .
 config
@@ -1903,25 +1849,6 @@
 "
 )
         
-self
-.
-config
-[
-"
-build
-"
-]
-.
-setdefault
-(
-"
-llvm
--
-assertions
-"
-llvm_assertions_default
-)
-        
 self
 .
 config
@@ -2301,37 +2228,6 @@
 (
 )
         
-elif
-not
-self
-.
-config
-[
-"
-build
-"
-]
-[
-"
-llvm
--
-assertions
-"
-]
-:
-            
-return
-self
-.
-rust_nightly_date
-(
-)
-+
-"
--
-alt
-"
-        
 else
 :
             
diff --git a/servo/rust-toolchain b/servo/rust-toolchain
index fb5e06b3851e0..5d6cbb74a8200 100644
--- a/servo/rust-toolchain
+++ b/servo/rust-toolchain
@@ -4,4 +4,4 @@ nightly
 -
 11
 -
-09
+14
diff --git a/servo/servobuild.example b/servo/servobuild.example
index da498a10709ba..1174fc7dd1f1b 100644
--- a/servo/servobuild.example
+++ b/servo/servobuild.example
@@ -378,21 +378,6 @@ mode
 dev
 "
 #
-Whether
-to
-enable
-LLVM
-assertions
-in
-rustc
-.
-#
-llvm
--
-assertions
-=
-false
-#
 Set
 "
 android