diff --git a/pkgs/development/tools/analysis/checkstyle/default.nix b/pkgs/development/tools/analysis/checkstyle/default.nix
index eee347f5266..5b80a5079b6 100644
--- a/pkgs/development/tools/analysis/checkstyle/default.nix
+++ b/pkgs/development/tools/analysis/checkstyle/default.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, makeWrapper, jre }:
 
 stdenv.mkDerivation rec {
-  version = "8.20";
+  version = "8.21";
   name = "checkstyle-${version}";
 
   src = fetchurl {
     url = "https://github.com/checkstyle/checkstyle/releases/download/checkstyle-${version}/checkstyle-${version}-all.jar";
-    sha256 = "1vsszdmdpyjdwlc9qqw4m8s6rw3pkdrczrmlmydwqmzvzr559nyp";
+    sha256 = "1jd6kbfmvgr3mr8kjhhr1fj1i3j36ysnfi14g5027ngwbq7klm7d";
   };
 
   nativeBuildInputs = [ makeWrapper ];
@@ -32,6 +32,6 @@ stdenv.mkDerivation rec {
     homepage = http://checkstyle.sourceforge.net/;
     license = licenses.lgpl21;
     maintainers = with maintainers; [ pSub ];
-    platforms = with platforms; linux;
+    platforms = jre.meta.platforms;
   };
 }