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-rw-r--r--third_party/nix/default.nix6
1 files changed, 3 insertions, 3 deletions
diff --git a/third_party/nix/default.nix b/third_party/nix/default.nix
index df6a6da72ff7..42b0324e8ea9 100644
--- a/third_party/nix/default.nix
+++ b/third_party/nix/default.nix
@@ -57,14 +57,14 @@ let
     cp ${pkgs.busybox}/bin/busybox $out/bin
   '';
 
-in lib.fix (self: pkgs.llvmPackages.libcxxStdenv.mkDerivation {
+in lib.fix (self: pkgs.llvmPackages_11.libcxxStdenv.mkDerivation {
   pname = "tvix";
   version = "2.3.4";
   inherit src;
 
   nativeBuildInputs = with pkgs; [
     bison
-    clang-tools
+    clang-tools_11
     cmake
     libxml2
     libxslt
@@ -143,7 +143,7 @@ in lib.fix (self: pkgs.llvmPackages.libcxxStdenv.mkDerivation {
   NIX_PROTO_SRCS = protoSrcs;
 
   # Work around broken system header include flags in the cxx toolchain.
-  LIBCXX_INCLUDE = "${pkgs.llvmPackages.libcxx}/include/c++/v1";
+  LIBCXX_INCLUDE = "${pkgs.llvmPackages_11.libcxx}/include/c++/v1";
 
   SANDBOX_SHELL="${pkgs.busybox}/bin/busybox";