diff --git a/compilers/rust-riscv32i-crates.nix b/compilers/rust-riscv32i-crates.nix
index 64712c9..3696155 100644
--- a/compilers/rust-riscv32i-crates.nix
+++ b/compilers/rust-riscv32i-crates.nix
@@ -10,9 +10,9 @@ stdenv.mkDerivation {
     mkdir -p ''${destdir}
     export RUSTC_BOOTSTRAP=1
     ''${rustc} --crate-name core src/libcore/lib.rs
-    ''${rustc} --crate-name compiler_builtins src/libcompiler_builtins/src/lib.rs --cfg 'feature="compiler-builtins"' --cfg 'feature="mem"'
     ''${rustc} --crate-name alloc src/liballoc/lib.rs
   '';
+  #  ''${rustc} --crate-name compiler_builtins src/libcompiler_builtins/src/lib.rs --cfg 'feature="compiler-builtins"' --cfg 'feature="mem"'
   #  ''${rustc} --crate-name libc ${./libc_mini.rs}
   #  ''${rustc} --crate-name unwind src/libunwind/lib.rs
   #  ''${rustc} --crate-name std src/libstd/lib.rs