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-rw-r--r--pkgs/tools/package-management/nix/default.nix5
1 files changed, 3 insertions, 2 deletions
diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index ea03570bb3e5..e6beee0b38ce 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -51,10 +51,11 @@ let
     preConfigure =
       # Copy libboost_context so we don't get all of Boost in our closure.
       # https://github.com/NixOS/nixpkgs/issues/45462
-      lib.optionalString is20
-      ''
+      if is20 then ''
         mkdir -p $out/lib
         cp ${boost}/lib/libboost_context* $out/lib
+      '' else ''
+        configureFlagsArray+=(BDW_GC_LIBS="-lgc -lgccpp")
       '';
 
     configureFlags =