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-rw-r--r--pkgs/development/libraries/jsoncpp/default.nix9
1 files changed, 9 insertions, 0 deletions
diff --git a/pkgs/development/libraries/jsoncpp/default.nix b/pkgs/development/libraries/jsoncpp/default.nix
index 7eb7f393ba4..07563364e34 100644
--- a/pkgs/development/libraries/jsoncpp/default.nix
+++ b/pkgs/development/libraries/jsoncpp/default.nix
@@ -11,6 +11,15 @@ stdenv.mkDerivation rec {
     sha256 = "0p92i0hx2k3g8mwrcy339b56bfq8qgpb65id8xllkgd2ns4wi9zi";
   };
 
+  /* During darwin bootstrap, we have a cp that doesn't understand the
+   * --reflink=auto flag, which is used in the default unpackPhase for dirs
+   */
+  unpackPhase = ''
+    cp -a ${src} ${src.name}
+    chmod -R +w ${src.name}
+    export sourceRoot=${src.name}
+  '';
+
   nativeBuildInputs = [
     # cmake can be built with the system jsoncpp, or its own bundled version.
     # Obviously we cannot build it against the system jsoncpp that doesn't yet exist, so