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-rw-r--r--pkgs/development/interpreters/tcl/generic.nix4
1 files changed, 4 insertions, 0 deletions
diff --git a/pkgs/development/interpreters/tcl/generic.nix b/pkgs/development/interpreters/tcl/generic.nix
index eafffba4a34fe..3bf4ba2dc2f01 100644
--- a/pkgs/development/interpreters/tcl/generic.nix
+++ b/pkgs/development/interpreters/tcl/generic.nix
@@ -17,6 +17,10 @@ stdenv.mkDerivation rec {
   preConfigure = ''
     # Note: using $out instead of $man to prevent a runtime dependency on $man.
     configureFlagsArray+=(--mandir=$out/share/man --enable-man-symlinks)
+
+    # Don't install tzdata because NixOS already has a more up-to-date copy.
+    configureFlagsArray+=(--with-tzdata=no)
+
     cd unix
   '';