diff --git a/INSTALL.md b/INSTALL.md
index 1d408002f..9580ebc52 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -35,7 +35,6 @@ brew update
 brew install  \
   boost       \
   cmake       \
-  coreutils   \
   flex        \
   fmt         \
   git         \
diff --git a/bin/llvm-kompile-clang b/bin/llvm-kompile-clang
index aeecb672a..1db40397e 100644
--- a/bin/llvm-kompile-clang
+++ b/bin/llvm-kompile-clang
@@ -34,11 +34,11 @@ HERE
 infer_library_name() {
   base_name="$(basename "$1")"
   dir_name="$(dirname "$1")"
-  
+
   if [[ "$base_name" =~ \. ]]; then
     echo "$1"
   else
-    if [[ "$(uname)" == "Darwin" ]]; then
+    if [[ "$OSTYPE" == "darwin"* ]]; then
       ext=".dylib"
     else
       ext=".so"
@@ -81,7 +81,7 @@ while [[ $# -gt 0 ]]; do
       shift
       ;;
     -save-temps)
-      save_temps=true	    
+      save_temps=true
       ;;
     -o)
       output=true
diff --git a/nix/llvm-backend.nix b/nix/llvm-backend.nix
index 8ae6f352b..00a7990a8 100644
--- a/nix/llvm-backend.nix
+++ b/nix/llvm-backend.nix
@@ -1,4 +1,4 @@
-{ lib, src, cmake, coreutils, flex, fmt, pkgconfig, llvm, libllvm, libcxxabi, stdenv, boost, gmp
+{ lib, src, cmake, flex, fmt, pkgconfig, llvm, libllvm, libcxxabi, stdenv, boost, gmp
 , jemalloc, libffi, libiconv, libyaml, mpfr, ncurses, python39, unixtools,
 # Runtime dependencies:
 host, perl,
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ cmake flex llvm pkgconfig ];
   buildInputs = [ libyaml ];
   propagatedBuildInputs = [
-    boost coreutils fmt gmp jemalloc libffi mpfr ncurses python-env unixtools.xxd
+    boost fmt gmp jemalloc libffi mpfr ncurses python-env unixtools.xxd
   ] ++ lib.optional stdenv.isDarwin libiconv;
 
   dontStrip = true;
@@ -32,7 +32,6 @@ stdenv.mkDerivation {
                 'extra_python_flags=($(${python-env}/bin/pybind11-config --includes))'
 
     substituteInPlace bin/llvm-kompile-clang \
-      --replace 'uname' '${coreutils}/bin/uname' \
       --replace '"-lgmp"' '"-I${gmp.dev}/include" "-L${gmp}/lib" "-lgmp"' \
       --replace '"-lmpfr"' '-I${mpfr.dev}/include "-L${mpfr}/lib" "-lmpfr"' \
       --replace '"-lffi"' '"-L${libffi}/lib" "-lffi"' \