diff --git a/compilers/rust/default.nix b/compilers/rust/default.nix
index db591af..7f1e4ac 100644
--- a/compilers/rust/default.nix
+++ b/compilers/rust/default.nix
@@ -11,25 +11,24 @@ let
     url = "https://static.rust-lang.org/dist/rustc-${version}-src.tar.gz";
     sha256 = "0ji2l9xv53y27xy72qagggvq47gayr5lcv2jwvmfirx029vlqnac";
   };
-  # nixcloud team code
   riscv32imac-crates = stdenv.mkDerivation {
     name = "riscv32imac-crates";
     inherit src;
     phases = [ "unpackPhase" "buildPhase" ];
     buildPhase = ''
       destdir=$out
-      rustc="${rustc_internal}/bin/rustc --out-dir ''${destdir} -L ''${destdir} --target riscv32imac-unknown-none-elf -g -C target-feature=+mul,+div,+ffl1,+cmov,+addc -C opt-level=s --crate-type rlib"
+      rustc="${rustc_internal}/bin/rustc --out-dir ''${destdir} -L ''${destdir} --target riscv32imac-unknown-none-elf -g -C opt-level=s --crate-type rlib"
       
       mkdir -p ''${destdir}
       ''${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 std_unicode src/libstd_unicode/lib.rs
       ''${rustc} --crate-name alloc src/liballoc/lib.rs
-      ''${rustc} --crate-name libc src/liblibc_mini/lib.rs
-      ''${rustc} --crate-name unwind src/libunwind/lib.rs
-      ''${rustc} -Cpanic=abort --crate-name panic_abort src/libpanic_abort/lib.rs
-      ''${rustc} -Cpanic=unwind --crate-name panic_unwind src/libpanic_unwind/lib.rs --cfg llvm_libunwind
     '';
+    #  ''${rustc} --crate-name libc ${./libc_mini.rs}
+    #  ''${rustc} --crate-name unwind src/libunwind/lib.rs
+    #  ''${rustc} --crate-name std src/libstd/lib.rs
+    #  ''${rustc} -Cpanic=abort --crate-name panic_abort src/libpanic_abort/lib.rs
+    #  ''${rustc} -Cpanic=unwind --crate-name panic_unwind src/libpanic_unwind/lib.rs --cfg llvm_libunwind
   };
   # nixcloud team code
   # originally rustc but now renamed to rustc_internal