diff --git a/build_sysroot/Cargo.lock b/build_sysroot/Cargo.lock
index 7b66c220d486..3183d7660c60 100644
--- a/build_sysroot/Cargo.lock
+++ b/build_sysroot/Cargo.lock
@@ -135,9 +135,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.69"
+version = "0.2.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99e85c08494b21a9054e7fe1374a732aeadaff3980b6990b94bfd3a70f690005"
+checksum = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
 dependencies = [
  "rustc-std-workspace-core",
 ]
@@ -229,7 +229,6 @@ dependencies = [
  "alloc_system",
  "compiler_builtins",
  "core",
- "libc",
  "std",
  "test",
 ]
diff --git a/build_sysroot/Cargo.toml b/build_sysroot/Cargo.toml
index a4f766cf89cb..bb66d201a517 100644
--- a/build_sysroot/Cargo.toml
+++ b/build_sysroot/Cargo.toml
@@ -12,8 +12,6 @@ test = { path = "./sysroot_src/src/libtest" }
 
 alloc_system = { path = "./alloc_system" }
 
-libc = { version = "=0.2.69", default-features = false } # FIXME rustc 1.45.0-nightly (7ebd87a7a 2020-05-08) ices on libc 0.2.70
-
 [patch.crates-io]
 rustc-std-workspace-core = { path = "./sysroot_src/src/tools/rustc-std-workspace-core" }
 rustc-std-workspace-alloc = { path = "./sysroot_src/src/tools/rustc-std-workspace-alloc" }