diff --git a/nixos/doc/manual/release-notes/rl-2003.xml b/nixos/doc/manual/release-notes/rl-2003.xml
index c1cf89844a8..886b16ef965 100644
--- a/nixos/doc/manual/release-notes/rl-2003.xml
+++ b/nixos/doc/manual/release-notes/rl-2003.xml
@@ -220,6 +220,11 @@
      in conjunction with an external webserver to replace this functionality.
     </para>
    </listitem>
+   <listitem>
+    <para>
+     The fourStore and fourStoreEndpoint modules have been removed.
+    </para>
+   </listitem>
   </itemizedlist>
  </section>
 
diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index f8b188e7b1c..bedd87a368e 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -80,8 +80,8 @@ in
       #kdm = 39; # dropped in 17.03
       #ghostone = 40; # dropped in 18.03
       git = 41;
-      fourstore = 42;
-      fourstorehttp = 43;
+      #fourstore = 42; # dropped in 20.03
+      #fourstorehttp = 43; # dropped in 20.03
       virtuoso = 44;
       rtkit = 45;
       dovecot2 = 46;
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 8e373550bb3..bb217d873bb 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -254,8 +254,6 @@
   ./services/continuous-integration/jenkins/default.nix
   ./services/continuous-integration/jenkins/job-builder.nix
   ./services/continuous-integration/jenkins/slave.nix
-  ./services/databases/4store-endpoint.nix
-  ./services/databases/4store.nix
   ./services/databases/aerospike.nix
   ./services/databases/cassandra.nix
   ./services/databases/clickhouse.nix
diff --git a/nixos/modules/services/databases/4store-endpoint.nix b/nixos/modules/services/databases/4store-endpoint.nix
deleted file mode 100644
index 59ed0e5f0af..00000000000
--- a/nixos/modules/services/databases/4store-endpoint.nix
+++ /dev/null
@@ -1,74 +0,0 @@
-{ config, lib, pkgs, ... }:
-let
-  cfg = config.services.fourStoreEndpoint;
-  endpointUser = "fourstorehttp";
-  run = "${pkgs.su}/bin/su -s ${pkgs.runtimeShell} ${endpointUser} -c";
-in
-with lib;
-{
-
-  ###### interface
-
-  options = {
-
-    services.fourStoreEndpoint = {
-
-      enable = mkOption {
-        default = false;
-        description = "Whether to enable 4Store SPARQL endpoint.";
-      };
-
-      database = mkOption {
-        default = config.services.fourStore.database;
-        description = "RDF database name to expose via the endpoint. Defaults to local 4Store database name.";
-      };
-
-      listenAddress = mkOption {
-        default = null;
-        description = "IP address to listen on.";
-      };
-
-      port = mkOption {
-        default = 8080;
-        description = "port to listen on.";
-      };
-
-      options = mkOption {
-        default = "";
-        description = "Extra CLI options to pass to 4Store's 4s-httpd process.";
-      };
-
-    };
-
-  };
-
-
-  ###### implementation
-
-  config = mkIf cfg.enable {
-
-    assertions = singleton
-      { assertion = cfg.enable -> cfg.database != "";
-        message = "Must specify 4Store database name";
-      };
-
-    users.users = singleton
-      { name = endpointUser;
-        uid = config.ids.uids.fourstorehttp;
-        description = "4Store SPARQL endpoint user";
-      };
-
-    services.avahi.enable = true;
-
-    systemd.services."4store-endpoint" = {
-      after = [ "network.target" ];
-      wantedBy = [ "multi-user.target" ];
-
-      script = ''
-        ${run} '${pkgs.rdf4store}/bin/4s-httpd -D ${cfg.options} ${if cfg.listenAddress!=null then "-H ${cfg.listenAddress}" else "" } -p ${toString cfg.port} ${cfg.database}'
-      '';
-    };
-
-  };
-
-}
diff --git a/nixos/modules/services/databases/4store.nix b/nixos/modules/services/databases/4store.nix
deleted file mode 100644
index be4351c1c38..00000000000
--- a/nixos/modules/services/databases/4store.nix
+++ /dev/null
@@ -1,72 +0,0 @@
-{ config, lib, pkgs, ... }:
-let
-  cfg = config.services.fourStore;
-  stateDir = "/var/lib/4store";
-  fourStoreUser = "fourstore";
-  run = "${pkgs.su}/bin/su -s ${pkgs.runtimeShell} ${fourStoreUser}";
-in
-with lib;
-{
-
-  ###### interface
-
-  options = {
-
-    services.fourStore = {
-
-      enable = mkOption {
-        default = false;
-        description = "Whether to enable 4Store RDF database server.";
-      };
-
-      database = mkOption {
-        default = "";
-        description = "RDF database name. If it doesn't exist, it will be created. Databases are stored in ${stateDir}.";
-      };
-
-      options = mkOption {
-        default = "";
-        description = "Extra CLI options to pass to 4Store.";
-      };
-
-    };
-
-  };
-
-
-  ###### implementation
-
-  config = mkIf cfg.enable {
-
-    assertions = singleton
-      { assertion = cfg.enable -> cfg.database != "";
-        message = "Must specify 4Store database name.";
-      };
-
-    users.users = singleton
-      { name = fourStoreUser;
-        uid = config.ids.uids.fourstore;
-        description = "4Store database user";
-        home = stateDir;
-      };
-
-    services.avahi.enable = true;
-
-    systemd.services."4store" = {
-      after = [ "network.target" ];
-      wantedBy = [ "multi-user.target" ];
-
-      preStart = ''
-        mkdir -p ${stateDir}/
-        chown ${fourStoreUser} ${stateDir}
-        if ! test -e "${stateDir}/${cfg.database}"; then
-          ${run} -c '${pkgs.rdf4store}/bin/4s-backend-setup ${cfg.database}'
-        fi
-      '';
-
-      script = ''
-        ${run} -c '${pkgs.rdf4store}/bin/4s-backend -D ${cfg.options} ${cfg.database}'
-      '';
-    };
-  };
-}
diff --git a/pkgs/servers/http/4store/4store-1.1.6-glibc-2.26.patch b/pkgs/servers/http/4store/4store-1.1.6-glibc-2.26.patch
deleted file mode 100644
index dda21c54f69..00000000000
--- a/pkgs/servers/http/4store/4store-1.1.6-glibc-2.26.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff --git a/src/frontend/filter-datatypes.c b/src/frontend/filter-datatypes.c
-index 8aae1dd..49ed358 100644
---- a/src/frontend/filter-datatypes.c
-+++ b/src/frontend/filter-datatypes.c
-@@ -23,6 +23,7 @@
- #include <string.h>
- #include <math.h>
- #define __USE_MISC
-+#define __USE_XOPEN_EXTENDED
- #include <time.h>
- 
- #include "filter.h"
diff --git a/pkgs/servers/http/4store/default.nix b/pkgs/servers/http/4store/default.nix
deleted file mode 100644
index 6e4be4a36fe..00000000000
--- a/pkgs/servers/http/4store/default.nix
+++ /dev/null
@@ -1,50 +0,0 @@
-{ stdenv, fetchFromGitHub, librdf_raptor
-, librdf_rasqal, glib, libxml2, pcre
-, avahi, readline, ncurses, expat, autoreconfHook
-, zlib, pkgconfig, which, perl, libuuid
-, gmp, mpfr
-, db_dir ? "/var/lib/4store" }:
-
-
-stdenv.mkDerivation rec {
-  pname = "4store";
-  version = "1.1.6";
-
-  src = fetchFromGitHub {
-    owner = "4store";
-    repo = "4store";
-    rev = "v${version}";
-    sha256 = "1kzdfmwpzy64cgqlkcz5v4klwx99w0jk7afckyf7yqbqb4rydmpk";
-  };
-
-  patches = [ ./4store-1.1.6-glibc-2.26.patch ];
-
-  nativeBuildInputs = [ autoreconfHook perl pkgconfig which ];
-
-  buildInputs = [ librdf_raptor librdf_rasqal glib libxml2 pcre
-    avahi readline ncurses expat zlib libuuid gmp mpfr ];
-
-  # needed for ./autogen.sh
-  prePatch = ''
-    echo "${version}" > .version
-  '';
-
-  preConfigure =  ''
-    sed -e 's@#! */bin/bash@#! ${stdenv.shell}@' -i configure
-    find . -name Makefile -exec sed -e "s@/usr/local@$out@g" -i '{}' ';'
-
-    rm src/utilities/4s-backend
-    sed -e 's@/var/lib/4store@${db_dir}@g' -i configure.ac src/utilities/*
-    sed -e '/FS_STORE_ROOT/d' -i src/utilities/Makefile*
-  '';
-
-  enableParallelBuilding = true;
-
-  meta = with stdenv.lib; {
-    description = "SparQL query server (RDF storage)";
-    homepage = https://4store.danielknoell.de/;
-    maintainers = with maintainers; [ raskin ];
-    platforms = platforms.linux;
-    broken = true; # since 2018-04-11
-  };
-}
diff --git a/pkgs/servers/http/4store/src-for-default.nix b/pkgs/servers/http/4store/src-for-default.nix
deleted file mode 100644
index 7076b921911..00000000000
--- a/pkgs/servers/http/4store/src-for-default.nix
+++ /dev/null
@@ -1,9 +0,0 @@
-rec {
-   version="v1.1.5";
-   name="4store-v1.1.5";
-   hash="0nwckvf8xqwvc2h3v6s1rvmxvcx2xrjy6yapghc052180jw6zp9b";
-   url="http://4store.org/download/4store-${version}.tar.gz";
-   advertisedUrl="http://4store.org/download/4store-v1.1.5.tar.gz";
-  
-  
-}
diff --git a/pkgs/servers/http/4store/src-info-for-default.nix b/pkgs/servers/http/4store/src-info-for-default.nix
deleted file mode 100644
index 91a9bad92de..00000000000
--- a/pkgs/servers/http/4store/src-info-for-default.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  downloadPage = "http://4store.org/download/";
-  baseName = "4store";
-  choiceCommand = "tail -n 1";
-  versionExtractorSedScript = "s@.*-(v[0-9.]+)[.].*@\\1@";
-}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4ad6d9346b3..e68465838e7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14912,8 +14912,6 @@ in
     kerberos = libkrb5;
   };
 
-  rdf4store = callPackage ../servers/http/4store { };
-
   apacheHttpd_2_4 = callPackage ../servers/http/apache-httpd/2.4.nix { };
   apacheHttpd = pkgs.apacheHttpd_2_4;