buck: use jdk8

pkgs/development/tools/build-managers/buck/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, jdk11, ant, python3, watchman, bash, makeWrapper }:
+{ lib, stdenv, fetchFromGitHub, jdk8, ant, python3, watchman, bash, makeWrapper }:
 
 stdenv.mkDerivation rec {
   pname = "buck";
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     grep -l -r '/bin/bash' --null | xargs -0 sed -i -e "s!/bin/bash!${bash}/bin/bash!g"
   '';
 
-  nativeBuildInputs = [ makeWrapper python3 jdk11 ant watchman ];
+  nativeBuildInputs = [ makeWrapper python3 jdk8 ant watchman ];
 
   buildPhase = ''
     # Set correct version, see https://github.com/facebook/buck/issues/2607
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   installPhase = ''
     install -D -m755 buck-out/gen/*/programs/buck.pex $out/bin/buck
     wrapProgram $out/bin/buck \
-      --prefix PATH : "${lib.makeBinPath [ jdk11 watchman python3 ]}"
+      --prefix PATH : "${lib.makeBinPath [ jdk8 watchman python3 ]}"
   '';
 
   meta = with lib; {