diff --git a/pkgs/development/compilers/llvm/15/compiler-rt/default.nix b/pkgs/development/compilers/llvm/15/compiler-rt/default.nix
index 7b0996845e2e5..0a08f4dcf94b5 100644
--- a/pkgs/development/compilers/llvm/15/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/15/compiler-rt/default.nix
@@ -9,7 +9,7 @@ let
   useLLVM = stdenv.hostPlatform.useLLVM or false;
   bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
   haveLibc = stdenv.cc.libc != null;
-  inherit (stdenv.hostPlatform) isMusl;
+  inherit (stdenv.hostPlatform) isMusl isGnu;
 
   baseName = "compiler-rt";
 
@@ -38,7 +38,7 @@ stdenv.mkDerivation {
     "-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
     "-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
     "-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
-  ] ++ lib.optionals (haveLibc && !isMusl) [
+  ] ++ lib.optionals (haveLibc && isGnu) [
     "-DSANITIZER_COMMON_CFLAGS=-I${libxcrypt}/include"
   ] ++ lib.optionals (useLLVM || bareMetal || isMusl) [
     "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"