diff --git a/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml
index 85329c11413f..88d075a9a482 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml
@@ -517,6 +517,12 @@
           changelog</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The <literal>isabelle</literal> package has been upgraded from
+          2020 to 2021
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="sec-release-21.11-notable-changes">
diff --git a/nixos/doc/manual/release-notes/rl-2111.section.md b/nixos/doc/manual/release-notes/rl-2111.section.md
index 4034def5f3d0..f7275480ff81 100644
--- a/nixos/doc/manual/release-notes/rl-2111.section.md
+++ b/nixos/doc/manual/release-notes/rl-2111.section.md
@@ -130,6 +130,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - `icingaweb2` was upgraded to a new release which requires a manual database upgrade, see [upstream changelog](https://github.com/Icinga/icingaweb2/releases/tag/v2.9.0).
 
+- The `isabelle` package has been upgraded from 2020 to 2021
+
 ## Other Notable Changes {#sec-release-21.11-notable-changes}
 
 - The setting [`services.openssh.logLevel`](options.html#opt-services.openssh.logLevel) `"VERBOSE"` `"INFO"`. This brings NixOS in line with upstream and other Linux distributions, and reduces log spam on servers due to bruteforcing botnets.
diff --git a/pkgs/applications/science/logic/isabelle/default.nix b/pkgs/applications/science/logic/isabelle/default.nix
index 600ae83ff912..f9337f690255 100644
--- a/pkgs/applications/science/logic/isabelle/default.nix
+++ b/pkgs/applications/science/logic/isabelle/default.nix
@@ -1,20 +1,20 @@
-{ lib, stdenv, fetchurl, perl, perlPackages, makeWrapper, nettools, java, polyml, z3, rlwrap }:
+{ lib, stdenv, fetchurl, perl, perlPackages, makeWrapper, nettools, java, polyml, z3, rlwrap, makeDesktopItem }:
 # nettools needed for hostname
 
 stdenv.mkDerivation rec {
   pname = "isabelle";
-  version = "2020";
+  version = "2021";
 
   dirname = "Isabelle${version}";
 
   src = if stdenv.isDarwin
     then fetchurl {
       url = "https://isabelle.in.tum.de/website-${dirname}/dist/${dirname}_macos.tar.gz";
-      sha256 = "1sfr5filsaqj93g5y4p9n8g5652dhr4whj25x4lifdxr2pp560xx";
+      sha256 = "1c2qm2ksmpyxyccyyn4lyj2wqj5m74nz2i0c5abrd1hj45zcnh1m";
     }
     else fetchurl {
       url = "https://isabelle.in.tum.de/website-${dirname}/dist/${dirname}_linux.tar.gz";
-      sha256 = "1bibabhlsvf6qsjjkgxcpq3cvl1z7r8yfcgqbhbvsiv69n3gyfk3";
+      sha256 = "1isgc9w4q95638dcag9gxz1kmf97pkin3jz1dm2lhd64b2k12y2x";
     };
 
   nativeBuildInputs = [ makeWrapper ];
@@ -48,6 +48,8 @@ stdenv.mkDerivation rec {
       ISABELLE_JDK_HOME=${java}
     EOF
 
+    sed -i -e 's/naproche_server : bool = true/naproche_server : bool = false/' contrib/naproche-*/etc/options
+
     echo ISABELLE_LINE_EDITOR=${rlwrap}/bin/rlwrap >>etc/settings
 
     for comp in contrib/jdk* contrib/polyml-* contrib/z3-*; do
@@ -66,9 +68,26 @@ stdenv.mkDerivation rec {
     cd $out/$dirname
     bin/isabelle install $out/bin
 
+    # icon
+    mkdir -p "$out/share/icons/hicolor/isabelle/apps"
+    cp "$out/Isabelle${version}/lib/icons/isabelle.xpm" "$out/share/icons/hicolor/isabelle/apps/"
+
+    # desktop item
+    mkdir -p "$out/share"
+    cp -r "${desktopItem}/share/applications" "$out/share/applications"
+
     wrapProgram $out/$dirname/src/HOL/Tools/ATP/scripts/remote_atp --set PERL5LIB ${perlPackages.makeFullPerlPath [ perlPackages.LWP ]}
   '';
 
+  desktopItem = makeDesktopItem {
+    name = "isabelle";
+    exec = "isabelle jedit";
+    icon = "isabelle";
+    desktopName = "Isabelle";
+    comment = meta.description;
+    categories = "Education;Science;Math;";
+  };
+
   meta = with lib; {
     description = "A generic proof assistant";
 
diff --git a/pkgs/development/compilers/polyml/default.nix b/pkgs/development/compilers/polyml/default.nix
index d2a150334228..2af100d067bc 100644
--- a/pkgs/development/compilers/polyml/default.nix
+++ b/pkgs/development/compilers/polyml/default.nix
@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation rec {
   pname = "polyml";
-  version = "5.8.1";
+  version = "5.8.2";
 
   prePatch = lib.optionalString stdenv.isDarwin ''
     substituteInPlace configure.ac --replace stdc++ c++
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     owner = "polyml";
     repo = "polyml";
     rev = "v${version}";
-    sha256 = "0gcx2fjiwsiazlyfhm7zlrd563blc4fy9w2mspib9divbavaxin6";
+    sha256 = "0vvla816g9rk9aa75gq63rb7bf6yla27p8wh1s1ycgq2in2zk0py";
   };
 
   meta = with lib; {