diff --git a/pkgs/os-specific/darwin/cctools/apple.nix b/pkgs/os-specific/darwin/cctools/apple.nix
deleted file mode 100644
index dee4e2006256..000000000000
--- a/pkgs/os-specific/darwin/cctools/apple.nix
+++ /dev/null
@@ -1,122 +0,0 @@
-{ lib, stdenv, fetchFromGitHub, symlinkJoin, xcbuildHook, tcsh, libobjc, libtapi, libunwind, llvm, memstreamHook, xar }:
-
-let
-
-cctools = stdenv.mkDerivation rec {
-  pname = "cctools";
-  version = "973.0.1";
-
-  src = fetchFromGitHub {
-    owner = "apple-oss-distributions";
-    repo = "cctools";
-    rev = "${pname}-${version}";
-    hash = "sha256-0NlDqy3zeg4D0MbDipx0sMYDfzYa63Jxfsckzz/928o=";
-  };
-
-  patches = [
-    ./cctools-add-missing-vtool-libstuff-dep.patch
-  ];
-
-  postPatch = ''
-    for file in libstuff/writeout.c misc/libtool.c misc/lipo.c; do
-      substituteInPlace "$file" \
-        --replace '__builtin_available(macOS 10.12, *)' '0'
-    done
-    substituteInPlace libmacho/swap.c \
-      --replace '#ifndef RLD' '#if 1'
-  '';
-
-  nativeBuildInputs = [ xcbuildHook memstreamHook ];
-  buildInputs = [ libobjc llvm ];
-
-  xcbuildFlags = [
-    "MACOSX_DEPLOYMENT_TARGET=10.12"
-  ];
-
-  doCheck = true;
-  checkPhase = ''
-    runHook preCheck
-
-    Products/Release/libstuff_test
-    rm Products/Release/libstuff_test
-
-    runHook postCheck
-  '';
-
-  installPhase = ''
-    runHook preInstall
-
-    rm -rf "$out/usr"
-    mkdir -p "$out/bin"
-    find Products/Release -maxdepth 1 -type f -perm 755 -exec cp {} "$out/bin/" \;
-    cp -r include "$out/"
-
-    ln -s ./nm-classic "$out"/bin/nm
-    ln -s ./otool-classic "$out"/bin/otool
-
-    runHook postInstall
-  '';
-};
-
-ld64 = stdenv.mkDerivation rec {
-  pname = "ld64";
-  version = "609";
-
-  src = fetchFromGitHub {
-    owner = "apple-oss-distributions";
-    repo = "ld64";
-    rev = "${pname}-${version}";
-    hash = "sha256-WAaphem6NS4eCHL/pISlDXnO1CDYTgSrVGzcothh4/Q=";
-  };
-
-  postPatch = ''
-    substituteInPlace ld64.xcodeproj/project.pbxproj \
-      --replace "/bin/csh" "${tcsh}/bin/tcsh" \
-      --replace 'F9E8D4BE07FCAF2A00FD5801 /* PBXBuildRule */,' "" \
-      --replace 'F9E8D4BD07FCAF2000FD5801 /* PBXBuildRule */,' ""
-
-    sed -i src/ld/Options.cpp -e '1iconst char ldVersionString[] = "${version}";'
-  '';
-
-  nativeBuildInputs = [ xcbuildHook ];
-  buildInputs = [
-    libtapi
-    libunwind
-    llvm
-    xar
-  ];
-
-  installPhase = ''
-    runHook preInstall
-
-    mkdir -p "$out/bin"
-    find Products/Release-assert -maxdepth 1 -type f -perm 755 -exec cp {} "$out/bin/" \;
-
-    runHook postInstall
-  '';
-};
-
-in
-
-symlinkJoin rec {
-  name = "cctools-${version}";
-  version = "${cctools.version}-${ld64.version}";
-
-  paths = [
-    cctools
-    ld64
-  ];
-
-  # workaround for the fetch-tarballs script
-  passthru = {
-    inherit (cctools) src;
-    ld64_src = ld64.src;
-  };
-
-  meta = with lib; {
-    description = "MacOS Compiler Tools";
-    homepage = "http://www.opensource.apple.com/source/cctools/";
-    license = licenses.apple-psl20;
-    platforms = platforms.darwin;
-  };
-}
diff --git a/pkgs/os-specific/darwin/cctools/cctools-add-missing-vtool-libstuff-dep.patch b/pkgs/os-specific/darwin/cctools/cctools-add-missing-vtool-libstuff-dep.patch
deleted file mode 100644
index 1cd65ec6bcf1..000000000000
--- a/pkgs/os-specific/darwin/cctools/cctools-add-missing-vtool-libstuff-dep.patch
+++ /dev/null
@@ -1,11 +0,0 @@
-diff -ru a/cctools.xcodeproj/project.pbxproj b/cctools.xcodeproj/project.pbxproj
---- a/cctools.xcodeproj/project.pbxproj	2021-02-24 20:30:55.000000000 -0500
-+++ b/cctools.xcodeproj/project.pbxproj	2022-01-31 20:01:09.000000000 -0500
-@@ -2558,6 +2558,7 @@
- 			isa = PBXFrameworksBuildPhase;
- 			buildActionMask = 2147483647;
- 			files = (
-+				DE97E92421F3B86100C7947D /* libstuff.a in Frameworks */,
- 			);
- 			runOnlyForDeploymentPostprocessing = 0;
- 		};
diff --git a/pkgs/os-specific/darwin/cctools/darwin-memstream.patch b/pkgs/os-specific/darwin/cctools/darwin-memstream.patch
deleted file mode 100644
index 3e0d0a43ba8d..000000000000
--- a/pkgs/os-specific/darwin/cctools/darwin-memstream.patch
+++ /dev/null
@@ -1,17 +0,0 @@
---- a/cctools/include/stuff/diagnostics.h
-+++ b/cctools/include/stuff/diagnostics.h
-@@ -60,13 +60,6 @@ void diagnostics_log_msg(enum diagnostic_level level, const char* message);
-  */
- void diagnostics_write(void);
- 
--#if defined(__APPLE__ ) && defined(__has_builtin)
--#  if __has_builtin(__builtin_available)
--#    define HAVE_OPENMEMSTREAM_RUNTIME __builtin_available(macOS 10.13, *)
--#  endif
--#endif
--#ifndef HAVE_OPENMEMSTREAM_RUNTIME
--#  define HAVE_OPENMEMSTREAM_RUNTIME 1
--#endif
-+#define HAVE_OPENMEMSTREAM_RUNTIME 1
- 
- #endif /* diagnostics_h */
diff --git a/pkgs/os-specific/darwin/cctools/ld-ignore-rpath-link.patch b/pkgs/os-specific/darwin/cctools/ld-ignore-rpath-link.patch
deleted file mode 100644
index fc87f69ac32d..000000000000
--- a/pkgs/os-specific/darwin/cctools/ld-ignore-rpath-link.patch
+++ /dev/null
@@ -1,16 +0,0 @@
-diff --git a/cctools/ld64/src/ld/Options.cpp b/cctools/ld64/src/ld/Options.cpp
-index 2565518..9250016 100644
---- a/cctools/ld64/src/ld/Options.cpp
-+++ b/cctools/ld64/src/ld/Options.cpp
-@@ -2522,6 +2522,11 @@ void Options::parse(int argc, const char* argv[])
- 					throw "missing argument to -rpath";
- 				fRPaths.push_back(path);
- 			}
-+			else if ( strcmp(arg, "-rpath-link") == 0 ) {
-+				const char* path = argv[++i];
-+				if ( path == NULL )
-+					throw "missing argument to -rpath-link";
-+			}
- 			else if ( strcmp(arg, "-read_only_stubs") == 0 ) {
- 				fReadOnlyx86Stubs = true;
- 			}
diff --git a/pkgs/os-specific/darwin/cctools/ld-rpath-nonfinal.patch b/pkgs/os-specific/darwin/cctools/ld-rpath-nonfinal.patch
deleted file mode 100644
index 17ad9053f3bd..000000000000
--- a/pkgs/os-specific/darwin/cctools/ld-rpath-nonfinal.patch
+++ /dev/null
@@ -1,29 +0,0 @@
-diff --git a/cctools/ld64/src/ld/Options.cpp b/cctools/ld64/src/ld/Options.cpp
-index e4b37ec..4189ebc 100644
---- a/cctools/ld64/src/ld/Options.cpp
-+++ b/cctools/ld64/src/ld/Options.cpp
-@@ -5800,24 +5800,6 @@ void Options::checkIllegalOptionCombinations()
- 	if ( fDeadStrip && (fOutputKind == Options::kObjectFile) )
- 		throw "-r and -dead_strip cannot be used together";
- 
--	// can't use -rpath unless targeting 10.5 or later
--	if ( fRPaths.size() > 0 ) {
--		if ( !platforms().minOS(ld::version2008) )
--			throw "-rpath can only be used when targeting Mac OS X 10.5 or later";
--		switch ( fOutputKind ) {
--			case Options::kDynamicExecutable:
--			case Options::kDynamicLibrary:
--			case Options::kDynamicBundle:
--				break;
--			case Options::kStaticExecutable:
--			case Options::kObjectFile:
--			case Options::kDyld:
--			case Options::kPreload:
--			case Options::kKextBundle:
--				throw "-rpath can only be used when creating a dynamic final linked image";
--		}
--	}
--	
- 	if ( fPositionIndependentExecutable ) {
- 		switch ( fOutputKind ) {
- 			case Options::kDynamicExecutable:
diff --git a/pkgs/os-specific/darwin/cctools/llvm.nix b/pkgs/os-specific/darwin/cctools/llvm.nix
deleted file mode 100644
index f2986bf872f7..000000000000
--- a/pkgs/os-specific/darwin/cctools/llvm.nix
+++ /dev/null
@@ -1,113 +0,0 @@
-# Create a cctools-compatible bintools that uses equivalent tools from LLVM in place of the ones
-# from cctools when possible.
-
-{ lib, stdenv, makeWrapper, cctools-port, llvmPackages, enableManpages ? stdenv.targetPlatform == stdenv.hostPlatform }:
-
-let
-  inherit (stdenv) targetPlatform hostPlatform;
-
-  cctoolsVersion = lib.getVersion cctools-port;
-  llvmVersion = llvmPackages.release_version;
-
-  # `bitcode_strip` is not available until LLVM 12.
-  useLLVMBitcodeStrip = lib.versionAtLeast llvmVersion "12";
-
-  # A compatible implementation of `otool` was not added until LLVM 13.
-  useLLVMOtool = lib.versionAtLeast llvmVersion "13";
-
-  # Older versions of `strip` cause problems for the version of `codesign_allocate` available in
-  # the version of cctools in nixpkgs. The version of `codesign_allocate` in cctools-1005.2 does
-  # not appear to have issues, but the source is not available yet (as of June 2023).
-  useLLVMStrip = lib.versionAtLeast llvmVersion "15" || lib.versionAtLeast cctoolsVersion "1005.2";
-
-  # Clang 11 performs an optimization on x86_64 that is sensitive to the presence of debug info.
-  # This causes GCC to fail to bootstrap due to object file differences between stages 2 and 3.
-  useClangAssembler = lib.versionAtLeast llvmVersion "12" || !stdenv.isx86_64;
-
-  llvm_bins = [
-    "dwarfdump"
-    "nm"
-    "objdump"
-    "size"
-    "strings"
-  ]
-  ++ lib.optional useLLVMBitcodeStrip "bitcode-strip"
-  ++ lib.optional useLLVMOtool "otool"
-  ++ lib.optional useLLVMStrip "strip";
-
-  # Only include the tools that LLVM doesn’t provide and that are present normally on Darwin.
-  # The only exceptions are the following tools, which should be reevaluated when LLVM is bumped.
-  # - install_name_tool (llvm-objcopy): unrecognized linker commands when building open source CF;
-  # - libtool (llvm-libtool-darwin): not fully compatible when used with xcbuild; and
-  # - lipo (llvm-lipo): crashes when running the LLVM test suite.
-  cctools_bins = [
-    "cmpdylib"
-    "codesign_allocate"
-    "ctf_insert"
-    "install_name_tool"
-    "ld"
-    "libtool"
-    "lipo"
-    "nmedit"
-    "pagestuff"
-    "ranlib"
-    "segedit"
-    "vtool"
-  ]
-  ++ lib.optional (!useLLVMBitcodeStrip) "bitcode_strip"
-  ++ lib.optional (!useLLVMOtool) "otool"
-  ++ lib.optional (!useLLVMStrip) "strip"
-  ++ lib.optional (!useClangAssembler) "as";
-
-  targetPrefix = lib.optionalString (targetPlatform != hostPlatform) "${targetPlatform.config}-";
-
-  linkManPages = pkg: source: target: lib.optionalString enableManpages ''
-    sourcePath=${pkg}/share/man/man1/${source}.1.gz
-    targetPath=$man/share/man/man1/${target}.1.gz
-
-    if [ -f "$sourcePath" ]; then
-      mkdir -p "$(dirname "$targetPath")"
-      ln -s "$sourcePath" "$targetPath"
-    fi
-  '';
-in
-stdenv.mkDerivation {
-  pname = "cctools-llvm";
-  version = "${llvmVersion}-${cctoolsVersion}";
-
-  nativeBuildInputs = [ makeWrapper ];
-
-  # The `man` output has to be included unconditionally because darwin.binutils expects it.
-  outputs = [ "out" "dev" "man" ];
-
-  buildCommand = ''
-    mkdir -p "$out/bin" "$man"
-    ln -s ${lib.getDev cctools-port} "$dev"
-
-  '' + lib.optionalString useClangAssembler ''
-    # Use the clang-integrated assembler instead of using `as` from cctools.
-    makeWrapper "${lib.getBin llvmPackages.clang-unwrapped}/bin/clang" "$out/bin/${targetPrefix}as" \
-      --add-flags "-x assembler -integrated-as -c"
-
-  '' + ''
-    ln -s "${lib.getBin llvmPackages.bintools-unwrapped}/bin/${targetPrefix}llvm-ar" "$out/bin/${targetPrefix}ar"
-    ${linkManPages llvmPackages.llvm-manpages "llvm-ar" "ar"}
-
-    for tool in ${toString llvm_bins}; do
-      cctoolsTool=''${tool/-/_}
-      ln -s "${lib.getBin llvmPackages.llvm}/bin/llvm-$tool" "$out/bin/${targetPrefix}$cctoolsTool"
-      ${linkManPages llvmPackages.llvm-manpages "llvm-$tool" "$cctoolsTool"}
-    done
-
-    for tool in ${toString cctools_bins}; do
-      ln -s "${lib.getBin cctools-port}/bin/${targetPrefix}$tool" "$out/bin/${targetPrefix}$tool"
-      ${linkManPages (lib.getMan cctools-port) "$tool" "$tool"}
-    done
-
-    ${linkManPages (lib.getMan cctools-port) "ld64" "ld64"}
-    ${lib.optionalString (!useLLVMOtool)  # The actual man page for otool in cctools is llvm-otool
-      (linkManPages (lib.getMan cctools-port) "llvm-otool" "llvm-otool")}
-  '';
-
-  passthru = { inherit targetPrefix; };
-}
diff --git a/pkgs/os-specific/darwin/cctools/port.nix b/pkgs/os-specific/darwin/cctools/port.nix
deleted file mode 100644
index cc162d870a2e..000000000000
--- a/pkgs/os-specific/darwin/cctools/port.nix
+++ /dev/null
@@ -1,198 +0,0 @@
-{ lib, stdenv, fetchFromGitHub, autoconf, automake, libtool, autoreconfHook, memstreamHook
-, installShellFiles
-, libuuid
-, libobjc ? null, maloader ? null
-, enableTapiSupport ? true, libtapi
-, fetchpatch
-}:
-
-let
-
-  # The targetPrefix prepended to binary names to allow multiple binuntils on the
-  # PATH to both be usable.
-  targetPrefix = lib.optionalString
-    (stdenv.targetPlatform != stdenv.hostPlatform)
-    "${stdenv.targetPlatform.config}-";
-in
-
-# Non-Darwin alternatives
-assert (!stdenv.hostPlatform.isDarwin) -> maloader != null;
-
-stdenv.mkDerivation {
-  pname = "${targetPrefix}cctools-port";
-  version = "973.0.1";
-
-  src = fetchFromGitHub {
-    owner  = "tpoechtrager";
-    repo   = "cctools-port";
-    # This is the commit before: https://github.com/tpoechtrager/cctools-port/pull/114
-    # That specific change causes trouble for us (see the PR discussion), but
-    # is also currently the last commit on master at the time of writing, so we
-    # can just go back one step.
-    rev    = "457dc6ddf5244ebf94f28e924e3a971f1566bd66";
-    sha256 = "0ns12q7vg9yand4dmdsps1917cavfbw67yl5q7bm6kb4ia5kkx13";
-  };
-
-  outputs = [ "out" "dev" "gas" "man" ];
-
-  nativeBuildInputs = [ autoconf automake libtool autoreconfHook installShellFiles ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [ memstreamHook ];
-  buildInputs = [ libuuid ]
-    ++ lib.optionals stdenv.isDarwin [ libobjc ]
-    ++ lib.optional enableTapiSupport libtapi;
-
-  patches = [
-    ./ld-ignore-rpath-link.patch
-    ./ld-rpath-nonfinal.patch
-    (fetchpatch {
-      url = "https://github.com/tpoechtrager/cctools-port/commit/4a734070cd2838e49658464003de5b92271d8b9e.patch";
-      hash = "sha256-72KaJyu7CHXxJJ1GNq/fz+kW1RslO3UaKI91LhBtiXA=";
-    })
-    (fetchpatch {
-      url = "https://github.com/MercuryTechnologies/cctools-port/commit/025899b7b3593dedb0c681e689e57c0e7bbd9b80.patch";
-      hash = "sha256-SWVUzFaJHH2fu9y8RcU3Nx/QKx60hPE5zFx0odYDeQs=";
-    })
-    # Always use `open_memstream`. This is provided by memstream via hook on x86_64-darwin.
-    ./darwin-memstream.patch
-  ];
-
-  __propagatedImpureHostDeps = [
-    # As far as I can tell, otool from cctools is the only thing that depends on these two, and we should fix them
-    "/usr/lib/libobjc.A.dylib"
-    "/usr/lib/libobjc.dylib"
-  ];
-
-  enableParallelBuilding = true;
-
-  # TODO(@Ericson2314): Always pass "--target" and always targetPrefix.
-  configurePlatforms = [ "build" "host" ]
-    ++ lib.optional (stdenv.targetPlatform != stdenv.hostPlatform) "target";
-  configureFlags = [ "--disable-clang-as" ]
-    ++ lib.optionals enableTapiSupport [
-      "--enable-tapi-support"
-      "--with-libtapi=${libtapi}"
-    ];
-
-  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
-    substituteInPlace cctools/Makefile.am --replace libobjc2 ""
-  '' + ''
-    sed -i -e 's/addStandardLibraryDirectories = true/addStandardLibraryDirectories = false/' cctools/ld64/src/ld/Options.cpp
-
-    # FIXME: there are far more absolute path references that I don't want to fix right now
-    substituteInPlace cctools/configure.ac \
-      --replace "-isystem /usr/local/include -isystem /usr/pkg/include" "" \
-      --replace "-L/usr/local/lib" "" \
-
-    # Appears to use new libdispatch API not available in macOS SDK 10.12.
-    substituteInPlace cctools/ld64/src/ld/libcodedirectory.c \
-      --replace "#define LIBCD_PARALLEL 1" ""
-
-    patchShebangs tools
-    sed -i -e 's/which/type -P/' tools/*.sh
-
-    cd cctools
-  '';
-
-  preInstall = ''
-    installManPage ar/ar.{1,5}
-
-    # The makefile rules for installing headers are missing in 973.0.1.
-    # The below is derived from 949.0.1.
-    mkdir -p $dev/include/mach-o/i386
-    mkdir -p $dev/include/mach-o/ppc
-    mkdir -p $dev/include/mach-o/x86_64
-    mkdir -p $dev/include/mach-o/arm
-    mkdir -p $dev/include/mach-o/arm64
-    mkdir -p $dev/include/mach-o/m68k
-    mkdir -p $dev/include/mach-o/sparc
-    mkdir -p $dev/include/mach-o/hppa
-    mkdir -p $dev/include/mach-o/i860
-    mkdir -p $dev/include/mach-o/m88k
-    mkdir -p $dev/include/dyld
-    mkdir -p $dev/include/cbt
-
-    pushd include/mach-o
-    install -c -m 444  arch.h ldsyms.h reloc.h \
-      stab.h loader.h fat.h swap.h getsect.h nlist.h \
-      ranlib.h $dev/include/mach-o
-    popd
-
-    pushd include/mach-o/i386
-    install -c -m 444  swap.h \
-      $dev/include/mach-o/i386
-    popd
-
-    pushd include/mach-o/ppc
-    install -c -m 444  reloc.h swap.h \
-      $dev/include/mach-o/ppc
-    popd
-
-    pushd include/mach-o/x86_64
-    install -c -m 444  reloc.h \
-      $dev/include/mach-o/x86_64
-    popd
-
-    pushd include/mach-o/arm
-    install -c -m 444  reloc.h \
-      $dev/include/mach-o/arm
-    popd
-
-    pushd include/mach-o/arm64
-    install -c -m 444  reloc.h \
-      $dev/include/mach-o/arm64
-    popd
-
-    pushd include/mach-o/m68k
-    install -c -m 444  swap.h \
-      $dev/include/mach-o/m68k
-    popd
-
-    pushd include/mach-o/sparc
-    install -c -m 444  reloc.h swap.h \
-      $dev/include/mach-o/sparc
-    popd
-
-    pushd include/mach-o/hppa
-    install -c -m 444  reloc.h swap.h \
-      $dev/include/mach-o/hppa
-    popd
-
-    pushd include/mach-o/i860
-    install -c -m 444  reloc.h swap.h \
-      $dev/include/mach-o/i860
-    popd
-
-    pushd include/mach-o/m88k
-    install -c -m 444  reloc.h swap.h \
-      $dev/include/mach-o/m88k
-    popd
-
-    pushd include/stuff
-    install -c -m 444  bool.h \
-      $dev/include/dyld
-    popd
-
-    pushd include/cbt
-    install -c -m 444  libsyminfo.h \
-      $dev/include/cbt
-    popd
-  '';
-
-  postInstall = ''
-    # Move GNU as to its own output to prevent it from being used accidentally.
-    moveToOutput bin/gas "$gas"
-    moveToOutput libexec "$gas"
-  '';
-
-  passthru = {
-    inherit targetPrefix;
-  };
-
-  meta = {
-    broken = !stdenv.targetPlatform.isDarwin; # Only supports darwin targets
-    homepage = "http://www.opensource.apple.com/source/cctools/";
-    description = "MacOS Compiler Tools (cross-platform port)";
-    license = lib.licenses.apple-psl20;
-    maintainers = with lib.maintainers; [ matthewbauer ];
-  };
-}
diff --git a/pkgs/os-specific/darwin/libtapi/default.nix b/pkgs/os-specific/darwin/libtapi/default.nix
deleted file mode 100644
index cb6b3cf4b739..000000000000
--- a/pkgs/os-specific/darwin/libtapi/default.nix
+++ /dev/null
@@ -1,75 +0,0 @@
-{ lib, stdenv, fetchFromGitHub, pkgsBuildBuild, cmake, python3, ncurses }:
-
-stdenv.mkDerivation (finalAttrs: {
-  pname = "libtapi";
-  version = "1100.0.11"; # determined by looking at VERSION.txt
-
-  src = fetchFromGitHub {
-    owner = "tpoechtrager";
-    repo = "apple-libtapi";
-    rev = "664b8414f89612f2dfd35a9b679c345aa5389026";
-    sha256 = "1y1yl46msabfy14z0rln333a06087bk14f5h7q1cdawn8nmvbdbr";
-  };
-
-  sourceRoot = "${finalAttrs.src.name}/src/llvm";
-
-  # Backported from newer llvm, fixes configure error when cross compiling.
-  # Also means we don't have to manually fix the result with install_name_tool.
-  patches = [
-    ./disable-rpath.patch
-  ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-    # TODO: make unconditional and rebuild the world
-    # TODO: send upstream
-    ./native-clang-tblgen.patch
-  ];
-
-  nativeBuildInputs = [ cmake python3 ];
-
-  # ncurses is required here to avoid a reference to bootstrap-tools, which is
-  # not allowed for the stdenv.
-  buildInputs = [ ncurses ];
-
-  cmakeFlags = [ "-DLLVM_INCLUDE_TESTS=OFF" ]
-    ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
-      "-DCMAKE_CROSSCOMPILING=True"
-      # This package could probably have a llvm_6 llvm-tblgen and clang-tblgen
-      # provided to reduce some building. This package seems intended to
-      # include all of its dependencies, including enough of LLVM to build the
-      # required tablegens.
-      (
-        let
-          nativeCC = pkgsBuildBuild.stdenv.cc;
-          nativeBintools = nativeCC.bintools.bintools;
-          nativeToolchainFlags = [
-            "-DCMAKE_C_COMPILER=${nativeCC}/bin/${nativeCC.targetPrefix}cc"
-            "-DCMAKE_CXX_COMPILER=${nativeCC}/bin/${nativeCC.targetPrefix}c++"
-            "-DCMAKE_AR=${nativeBintools}/bin/${nativeBintools.targetPrefix}ar"
-            "-DCMAKE_STRIP=${nativeBintools}/bin/${nativeBintools.targetPrefix}strip"
-            "-DCMAKE_RANLIB=${nativeBintools}/bin/${nativeBintools.targetPrefix}ranlib"
-          ];
-        in "-DCROSS_TOOLCHAIN_FLAGS_NATIVE:list=${lib.concatStringsSep ";" nativeToolchainFlags}"
-      )
-    ];
-
-  # fixes: fatal error: 'clang/Basic/Diagnostic.h' file not found
-  # adapted from upstream
-  # https://github.com/tpoechtrager/apple-libtapi/blob/3cb307764cc5f1856c8a23bbdf3eb49dfc6bea48/build.sh#L58-L60
-  preConfigure = ''
-    INCLUDE_FIX="-I $PWD/projects/clang/include"
-    INCLUDE_FIX+=" -I $PWD/build/projects/clang/include"
-
-    cmakeFlagsArray+=(-DCMAKE_CXX_FLAGS="$INCLUDE_FIX")
-  '';
-
-  buildFlags = [ "clangBasic" "libtapi" "tapi" ];
-
-  installTargets = [ "install-libtapi" "install-tapi-headers" "install-tapi" ];
-
-  meta = with lib; {
-    description = "Replaces the Mach-O Dynamic Library Stub files in Apple's SDKs to reduce the size";
-    mainProgram = "tapi";
-    homepage = "https://github.com/tpoechtrager/apple-libtapi";
-    license = licenses.ncsa;
-    maintainers = with maintainers; [ matthewbauer ];
-  };
-})
diff --git a/pkgs/os-specific/darwin/libtapi/disable-rpath.patch b/pkgs/os-specific/darwin/libtapi/disable-rpath.patch
deleted file mode 100644
index 87c0cf3330de..000000000000
--- a/pkgs/os-specific/darwin/libtapi/disable-rpath.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/src/llvm/cmake/modules/AddLLVM.cmake b/src/llvm/cmake/modules/AddLLVM.cmake
-index a53016eb0..b65e608a4 100644
---- a/cmake/modules/AddLLVM.cmake
-+++ b/cmake/modules/AddLLVM.cmake
-@@ -1683,8 +1683,7 @@ function(llvm_setup_rpath name)
-   endif()
- 
-   if (APPLE)
--    set(_install_name_dir INSTALL_NAME_DIR "@rpath")
--    set(_install_rpath "@loader_path/../lib" ${extra_libdir})
-+    set(_install_name_dir)
-   elseif(UNIX)
-     set(_install_rpath "\$ORIGIN/../lib${LLVM_LIBDIR_SUFFIX}" ${extra_libdir})
-     if(${CMAKE_SYSTEM_NAME} MATCHES "(FreeBSD|DragonFly)")
diff --git a/pkgs/os-specific/darwin/libtapi/native-clang-tblgen.patch b/pkgs/os-specific/darwin/libtapi/native-clang-tblgen.patch
deleted file mode 100644
index 9b715766a122..000000000000
--- a/pkgs/os-specific/darwin/libtapi/native-clang-tblgen.patch
+++ /dev/null
@@ -1,21 +0,0 @@
-diffprojects/libtapi/CMakeLists.txt b/src/llvm/projects/libtapi/CMakeLists.txt
-index 8ee6d8138..8277be147 100644
---- a/projects/libtapi/CMakeLists.txt
-+++ b/projects/libtapi/CMakeLists.txt
-@@ -193,7 +193,15 @@ if (NOT DEFINED CLANG_VERSION)
-   set(CLANG_VERSION "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}")
- endif ()
- if (NOT DEFINED CLANG_TABLEGEN_EXE)
--  set(CLANG_TABLEGEN_EXE "${LLVM_TOOLS_BINARY_DIR}/clang-tblgen")
-+  if(LLVM_USE_HOST_TOOLS)
-+    if (NOT CMAKE_CONFIGURATION_TYPES)
-+      set(CLANG_TABLEGEN_EXE "${LLVM_NATIVE_BUILD}/bin/clang-tblgen")
-+    else()
-+      set(CLANG_TABLEGEN_EXE "${LLVM_NATIVE_BUILD}/Release/bin/clang-tblgen")
-+    endif()
-+  else()
-+    set(CLANG_TABLEGEN_EXE "${LLVM_TOOLS_BINARY_DIR}/clang-tblgen")
-+  endif ()
- endif ()
- 
- # Include must go first.