diff --git a/pkgs/development/compilers/llvm/12/libcxx/default.nix b/pkgs/development/compilers/llvm/12/libcxx/default.nix
index 30dc3f4f206c..3ddcb7997505 100644
--- a/pkgs/development/compilers/llvm/12/libcxx/default.nix
+++ b/pkgs/development/compilers/llvm/12/libcxx/default.nix
@@ -23,12 +23,6 @@ stdenv.mkDerivation {
     ../../libcxx-0001-musl-hacks.patch
   ];
 
-  # Prevent errors like "error: 'foo' is unavailable: introduced in macOS yy.zz"
-  postPatch = ''
-    substituteInPlace include/__config \
-      --replace "#    define _LIBCPP_USE_AVAILABILITY_APPLE" ""
-  '';
-
   preConfigure = lib.optionalString stdenv.hostPlatform.isMusl ''
     patchShebangs utils/cat_files.py
   '';
diff --git a/pkgs/development/compilers/llvm/13/libcxx/default.nix b/pkgs/development/compilers/llvm/13/libcxx/default.nix
index ddf51d9a2fa4..0ce73ed97af6 100644
--- a/pkgs/development/compilers/llvm/13/libcxx/default.nix
+++ b/pkgs/development/compilers/llvm/13/libcxx/default.nix
@@ -25,12 +25,6 @@ stdenv.mkDerivation rec {
     ../../libcxx-0001-musl-hacks.patch
   ];
 
-  # Prevent errors like "error: 'foo' is unavailable: introduced in macOS yy.zz"
-  postPatch = ''
-    substituteInPlace include/__config \
-      --replace "#    define _LIBCPP_USE_AVAILABILITY_APPLE" ""
-  '';
-
   preConfigure = lib.optionalString stdenv.hostPlatform.isMusl ''
     patchShebangs utils/cat_files.py
   '';
diff --git a/pkgs/development/compilers/llvm/git/libcxx/default.nix b/pkgs/development/compilers/llvm/git/libcxx/default.nix
index bedfd5afee15..0ddf28909b8e 100644
--- a/pkgs/development/compilers/llvm/git/libcxx/default.nix
+++ b/pkgs/development/compilers/llvm/git/libcxx/default.nix
@@ -25,12 +25,6 @@ stdenv.mkDerivation rec {
     ../../libcxx-0001-musl-hacks.patch
   ];
 
-  # Prevent errors like "error: 'foo' is unavailable: introduced in macOS yy.zz"
-  postPatch = ''
-    substituteInPlace include/__config \
-      --replace "#    define _LIBCPP_USE_AVAILABILITY_APPLE" ""
-  '';
-
   preConfigure = lib.optionalString stdenv.hostPlatform.isMusl ''
     patchShebangs utils/cat_files.py
   '';