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-rw-r--r--pkgs/os-specific/linux/linuxptp/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/os-specific/linux/linuxptp/default.nix b/pkgs/os-specific/linux/linuxptp/default.nix
index c02297002fd94..23f79e7f66536 100644
--- a/pkgs/os-specific/linux/linuxptp/default.nix
+++ b/pkgs/os-specific/linux/linuxptp/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "man" ];
 
   postPatch = ''
-    substituteInPlace incdefs.sh --replace \
+    substituteInPlace incdefs.sh --replace-fail \
        '/usr/include/linux/' "${linuxHeaders}/include/linux/"
   '';