diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/reexported_libraries b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/reexported_libraries
deleted file mode 100644
index edc2e759a29e..000000000000
--- a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/reexported_libraries
+++ /dev/null
@@ -1,41 +0,0 @@
-# These are generated with otool -L /usr/lib/libSystem.dylib on a 10.11 machine
-/usr/lib/system/libcache.dylib
-/usr/lib/system/libcommonCrypto.dylib
-/usr/lib/system/libcompiler_rt.dylib
-/usr/lib/system/libcopyfile.dylib
-/usr/lib/system/libcorecrypto.dylib
-/usr/lib/system/libdispatch.dylib
-/usr/lib/system/libdyld.dylib
-/usr/lib/system/libkeymgr.dylib
-/usr/lib/system/liblaunch.dylib
-/usr/lib/system/libmacho.dylib
-/usr/lib/system/libquarantine.dylib
-/usr/lib/system/libremovefile.dylib
-/usr/lib/system/libsystem_asl.dylib
-/usr/lib/system/libsystem_blocks.dylib
-
-# We handle this specially in the expression
-# /usr/lib/system/libsystem_c.dylib
-
-/usr/lib/system/libsystem_configuration.dylib
-/usr/lib/system/libsystem_coreservices.dylib
-# /usr/lib/system/libsystem_coretls.dylib  # Removed in 10.13
-/usr/lib/system/libsystem_dnssd.dylib
-/usr/lib/system/libsystem_info.dylib
-
-# We handle this specially in the expression
-# /usr/lib/system/libsystem_kernel.dylib
-
-/usr/lib/system/libsystem_m.dylib
-/usr/lib/system/libsystem_malloc.dylib
-# /usr/lib/system/libsystem_network.dylib  # Removed in 10.14
-/usr/lib/system/libsystem_networkextension.dylib
-/usr/lib/system/libsystem_notify.dylib
-/usr/lib/system/libsystem_platform.dylib
-/usr/lib/system/libsystem_pthread.dylib
-/usr/lib/system/libsystem_sandbox.dylib
-/usr/lib/system/libsystem_secinit.dylib
-/usr/lib/system/libsystem_trace.dylib
-/usr/lib/system/libunc.dylib
-/usr/lib/system/libunwind.dylib
-/usr/lib/system/libxpc.dylib
diff --git a/pkgs/os-specific/darwin/darwin-stubs/default.nix b/pkgs/os-specific/darwin/darwin-stubs/default.nix
index f7f083e32f43..aa946eb5bf0a 100644
--- a/pkgs/os-specific/darwin/darwin-stubs/default.nix
+++ b/pkgs/os-specific/darwin/darwin-stubs/default.nix
@@ -1,20 +1,18 @@
-{ stdenv, fetchFromGitHub }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation {
   pname = "darwin-stubs";
   version = "10.12";
 
-  src = fetchFromGitHub {
-    owner = "NixOS";
-    repo = "darwin-stubs";
-    rev = "80b3d4a57d3454c975eefd984c804dbd76f04ef2";
-    sha256 = "0sslg4rmskms8ixixv1gvnrvvvmn723vbfjj6mcn24fj2ncg38y7";
+  src = fetchurl {
+    url = "https://github.com/NixOS/darwin-stubs/releases/download/v20201216/10.12.tar.gz";
+    sha256 = "1fyd3xig7brkzlzp0ql7vyfj5sp8iy56kgp548mvicqdyw92adgm";
   };
 
   dontBuild = true;
 
   installPhase = ''
     mkdir $out
-    cp -vr stubs/$version/* $out
+    mv * $out
   '';
 }
diff --git a/pkgs/stdenv/darwin/default.nix b/pkgs/stdenv/darwin/default.nix
index f07b1ee73b87..ecec2903b5f7 100644
--- a/pkgs/stdenv/darwin/default.nix
+++ b/pkgs/stdenv/darwin/default.nix
@@ -54,8 +54,6 @@ in rec {
     args    = [ ./unpack-bootstrap-tools.sh ];
 
     inherit (bootstrapFiles) mkdir bzip2 cpio tarball;
-    reexportedLibrariesFile =
-      ../../os-specific/darwin/apple-source-releases/Libsystem/reexported_libraries;
 
     __impureHostDeps = commonImpureHostDeps;
   };
@@ -167,19 +165,57 @@ in rec {
 
   stage0 = stageFun 0 null {
     overrides = self: super: with stage0; {
-      coreutils = { name = "bootstrap-stage0-coreutils"; outPath = bootstrapTools; };
-      gnugrep   = { name = "bootstrap-stage0-gnugrep";   outPath = bootstrapTools; };
+      coreutils = stdenv.mkDerivation {
+        name = "bootstrap-stage0-coreutils";
+        buildCommand = ''
+          mkdir -p $out
+          ln -s ${bootstrapTools}/bin $out/bin
+        '';
+      };
+
+      gnugrep = stdenv.mkDerivation {
+        name = "bootstrap-stage0-gnugrep";
+        buildCommand = ''
+          mkdir -p $out
+          ln -s ${bootstrapTools}/bin $out/bin
+        '';
+      };
 
       darwin = super.darwin // {
         Libsystem = stdenv.mkDerivation {
           name = "bootstrap-stage0-Libsystem";
           buildCommand = ''
             mkdir -p $out
-            ln -s ${bootstrapTools}/lib $out/lib
+
+            cp -r ${self.darwin.darwin-stubs}/usr/lib $out/lib
+            chmod -R +w $out/lib
+            substituteInPlace $out/lib/libSystem.B.tbd --replace /usr/lib/system $out/lib/system
+
+            ln -s libSystem.B.tbd $out/lib/libSystem.tbd
+
+            for name in c dbm dl info m mx poll proc pthread rpcsvc util gcc_s.10.4 gcc_s.10.5; do
+              ln -s libSystem.tbd $out/lib/lib$name.tbd
+            done
+
+            ln -s ${bootstrapTools}/lib/*.o $out/lib
+
+            ln -s ${bootstrapTools}/lib/libresolv.9.dylib $out/lib
+            ln -s libresolv.9.dylib $out/lib/libresolv.dylib
+
             ln -s ${bootstrapTools}/include-Libsystem $out/include
           '';
         };
-        dyld = bootstrapTools;
+
+        darwin-stubs = super.darwin.darwin-stubs.override { inherit (self) stdenv fetchurl; };
+
+        dyld = {
+          name = "bootstrap-stage0-dyld";
+          buildCommand = ''
+            mkdir -p $out
+            ln -s ${bootstrapTools}/lib     $out/lib
+            ln -s ${bootstrapTools}/include $out/include
+          '';
+        };
 
         binutils = lib.makeOverridable (import ../../build-support/bintools-wrapper) {
           shell = "${bootstrapTools}/bin/bash";
@@ -194,10 +230,15 @@ in rec {
       };
 
       llvmPackages_7 = {
-        clang-unwrapped = {
+        clang-unwrapped = stdenv.mkDerivation {
           name = "bootstrap-stage0-clang";
-          outPath = bootstrapTools;
           version = bootstrapClangVersion;
+          buildCommand = ''
+            mkdir -p $out/lib
+            ln -s ${bootstrapTools}/bin $out/bin
+            ln -s ${bootstrapTools}/lib/clang $out/lib/clang
+            ln -s ${bootstrapTools}/include $out/include
+          '';
         };
 
         libcxx = stdenv.mkDerivation {
@@ -256,6 +297,7 @@ in rec {
 
       darwin = super.darwin // {
         binutils = darwin.binutils.override {
+          coreutils = self.coreutils;
           libc = self.darwin.Libsystem;
         };
       };
@@ -268,8 +310,8 @@ in rec {
 
     allowedRequisites =
       [ bootstrapTools ] ++
-      (with pkgs; [ libcxx libcxxabi llvmPackages_7.compiler-rt ]) ++
-      (with pkgs.darwin; [ Libsystem ]);
+      (with pkgs; [ coreutils gnugrep libcxx libcxxabi llvmPackages_7.clang-unwrapped llvmPackages_7.compiler-rt ]) ++
+      (with pkgs.darwin; [ darwin-stubs Libsystem ]);
 
     overrides = persistent;
   };
@@ -318,8 +360,8 @@ in rec {
       [ bootstrapTools ] ++
       (with pkgs; [
         xz.bin xz.out libcxx libcxxabi llvmPackages_7.compiler-rt
-        zlib libxml2.out curl.out openssl.out libssh2.out
-        nghttp2.lib libkrb5 coreutils gnugrep pcre.out gmp libiconv
+        llvmPackages_7.clang-unwrapped zlib libxml2.out curl.out openssl.out
+        libssh2.out nghttp2.lib libkrb5 coreutils gnugrep pcre.out gmp libiconv
       ]) ++
       (with pkgs.darwin; [ dyld Libsystem CF ICU locale ]);
 
@@ -370,8 +412,8 @@ in rec {
       [ bootstrapTools ] ++
       (with pkgs; [
         xz.bin xz.out bash libcxx libcxxabi llvmPackages_7.compiler-rt
-        zlib libxml2.out curl.out openssl.out libssh2.out
-        nghttp2.lib libkrb5 coreutils gnugrep pcre.out gmp libiconv
+        llvmPackages_7.clang-unwrapped zlib libxml2.out curl.out openssl.out
+        libssh2.out nghttp2.lib libkrb5 coreutils gnugrep pcre.out gmp libiconv
       ]) ++
       (with pkgs.darwin; [ dyld ICU Libsystem locale ]);
 
diff --git a/pkgs/stdenv/darwin/make-bootstrap-tools.nix b/pkgs/stdenv/darwin/make-bootstrap-tools.nix
index 1243b96e5051..9824d57dff86 100644
--- a/pkgs/stdenv/darwin/make-bootstrap-tools.nix
+++ b/pkgs/stdenv/darwin/make-bootstrap-tools.nix
@@ -180,9 +180,6 @@ in rec {
   unpack = stdenv.mkDerivation (bootstrapFiles // {
     name = "unpack";
 
-    reexportedLibrariesFile =
-      ../../os-specific/darwin/apple-source-releases/Libsystem/reexported_libraries;
-
     # This is by necessity a near-duplicate of unpack-bootstrap-tools.sh. If we refer to it directly,
     # we can't make any changes to it due to our testing stdenv depending on it. Think of this as the
     # unpack-bootstrap-tools.sh for the next round of bootstrap tools.
diff --git a/pkgs/stdenv/darwin/unpack-bootstrap-tools.sh b/pkgs/stdenv/darwin/unpack-bootstrap-tools.sh
index 0da80ec5ce56..37beeaf28f94 100644
--- a/pkgs/stdenv/darwin/unpack-bootstrap-tools.sh
+++ b/pkgs/stdenv/darwin/unpack-bootstrap-tools.sh
@@ -17,41 +17,6 @@ for i in $out/bin/*; do
   fi
 done
 
-install_name_tool \
-  -id $out/lib/system/libsystem_c.dylib \
-  $out/lib/system/libsystem_c.dylib
-
-install_name_tool \
-  -id $out/lib/system/libsystem_kernel.dylib \
-  $out/lib/system/libsystem_kernel.dylib
-
-# TODO: this logic basically duplicates similar logic in the Libsystem expression. Deduplicate them!
-libs=$(cat $reexportedLibrariesFile | grep -v '^#')
-
-for i in $libs; do
-  if [ "$i" != "/usr/lib/system/libsystem_kernel.dylib" ] && [ "$i" != "/usr/lib/system/libsystem_c.dylib" ]; then
-    args="$args -reexport_library $i"
-  fi
-done
-
-ld -macosx_version_min 10.7 \
-   -arch x86_64 \
-   -dylib \
-   -o $out/lib/libSystem.B.dylib \
-   -compatibility_version 1.0 \
-   -current_version 1226.10.1 \
-   -reexport_library $out/lib/system/libsystem_c.dylib \
-   -reexport_library $out/lib/system/libsystem_kernel.dylib \
-   $args
-
-ln -s libSystem.B.dylib $out/lib/libSystem.dylib
-
-for name in c dbm dl info m mx poll proc pthread rpcsvc util gcc_s.10.4 gcc_s.10.5; do
-  ln -s libSystem.dylib $out/lib/lib$name.dylib
-done
-
-ln -s libresolv.9.dylib $out/lib/libresolv.dylib
-
 for i in $out/lib/*.dylib $out/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation; do
   if test ! -L "$i" -a "$i" != "$out/lib/libSystem*.dylib"; then
     echo "Patching $i"