diff --git a/pkgs/development/compilers/llvm/common/default.nix b/pkgs/development/compilers/llvm/common/default.nix
index a2464c52d936..eaba6f45edfe 100644
--- a/pkgs/development/compilers/llvm/common/default.nix
+++ b/pkgs/development/compilers/llvm/common/default.nix
@@ -541,7 +541,7 @@ let
             })
           ]
           # Backport version logic from Clang 16. This is needed by the following patch.
-          ++ lib.optional (lib.versionOlder (lib.versions.major metadata.release_version) "16") (fetchpatch {
+          ++ lib.optional (lib.versions.major metadata.release_version == "15") (fetchpatch {
             name = "clang-darwin-Use-consistent-version-define-stringifying-logic.patch";
             url = "https://github.com/llvm/llvm-project/commit/60a33ded751c86fff9ac1c4bdd2b341fbe4b0649.patch?full_index=1";
             includes = [ "lib/Basic/Targets/OSTargets.cpp" ];
@@ -550,13 +550,19 @@ let
           })
           # Backport `__ENVIRONMENT_OS_VERSION_MIN_REQUIRED__` support from Clang 17.
           # This is needed by newer SDKs (14+).
-          ++ lib.optional (lib.versionOlder (lib.versions.major metadata.release_version) "17") (fetchpatch {
-            name = "clang-darwin-An-OS-version-preprocessor-define.patch";
-            url = "https://github.com/llvm/llvm-project/commit/c8e2dd8c6f490b68e41fe663b44535a8a21dfeab.patch?full_index=1";
-            includes = [ "lib/Basic/Targets/OSTargets.cpp" ];
-            stripLen = 1;
-            hash = "sha256-Vs32kql7N6qtLqc12FtZHURcbenA7+N3E/nRRX3jdig=";
-          })
+          ++
+            lib.optional
+              (
+                lib.versionAtLeast (lib.versions.major metadata.release_version) "15"
+                && lib.versionOlder (lib.versions.major metadata.release_version) "17"
+              )
+              (fetchpatch {
+                name = "clang-darwin-An-OS-version-preprocessor-define.patch";
+                url = "https://github.com/llvm/llvm-project/commit/c8e2dd8c6f490b68e41fe663b44535a8a21dfeab.patch?full_index=1";
+                includes = [ "lib/Basic/Targets/OSTargets.cpp" ];
+                stripLen = 1;
+                hash = "sha256-Vs32kql7N6qtLqc12FtZHURcbenA7+N3E/nRRX3jdig=";
+              })
           ++ lib.optional (lib.versions.major metadata.release_version == "18") (fetchpatch {
             name = "tweak-tryCaptureVariable-for-unevaluated-lambdas.patch";
             url = "https://github.com/llvm/llvm-project/commit/3d361b225fe89ce1d8c93639f27d689082bd8dad.patch";