diff --git a/flake.nix b/flake.nix
index 3b429a2b..f81a423f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -245,6 +245,7 @@ rec {
           mautrix-discord
           mautrix-whatsapp
           mautrix-telegram
+          mautrix-slack
           python-mautrix
           python-tulir-telethon
           papermc
diff --git a/overlays/default.nix b/overlays/default.nix
index 97225a58..239650c6 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -36,6 +36,7 @@ inputs: system: self: prev: let
     mautrix-discord = self.callPackage ../packages/matrix/mautrix-discord {};
     mautrix-whatsapp = self.callPackage ../packages/matrix/mautrix-whatsapp {};
     mautrix-telegram = self.callPackage ../packages/matrix/mautrix-telegram {};
+    mautrix-slack = self.callPackage ../packages/matrix/mautrix-slack {};
     python-mautrix = self.python3Packages.callPackage ../packages/python/mautrix.nix {};
     python-tulir-telethon = self.python3Packages.callPackage ../packages/python/tulir-telethon.nix {};
     papermc = self.callPackage ../packages/minecraft/papermc {};
diff --git a/packages/matrix/mautrix-slack/default.nix b/packages/matrix/mautrix-slack/default.nix
new file mode 100644
index 00000000..6966701f
--- /dev/null
+++ b/packages/matrix/mautrix-slack/default.nix
@@ -0,0 +1,42 @@
+{
+  buildGoApplication,
+  olm,
+  fetchFromGitHub,
+  lib,
+  writeScript,
+  go_1_23,
+}: let
+  source = builtins.fromJSON (builtins.readFile ./source.json);
+in
+  buildGoApplication rec {
+    pname = "mautrix-slack";
+    version = source.date;
+    src = fetchFromGitHub {
+      owner = "mautrix";
+      repo = "slack";
+      inherit (source) rev sha256;
+    };
+    modules = ./gomod2nix.toml;
+    buildInputs = [
+      olm
+    ];
+    CGO_ENABLED = "1";
+    go = go_1_23;
+    meta = {
+      description = "slack-Matrix double-puppeting bridge";
+      broken = builtins.compareVersions go.version "1.18" < 0;
+    };
+    postConfigure = ''
+      chmod -R +w vendor/
+      for f in vendor/golang.org/x/net/publicsuffix/data/* $(find vendor -name '*.sql') vendor/maunium.net/go/mautrix/bridgev2/matrix/mxmain/example-config.yaml; do
+          cp -v --remove-destination -f `readlink $f` $f
+      done
+    '';
+    passthru.updateScript = writeScript "update-matrix-media-repo" ''
+      ${../../scripts/update-git.sh} "https://github.com/mautrix/slack" matrix/mautrix-slack/source.json
+      if [ "$(git diff -- matrix/mautrix-slack/source.json)" ]; then
+        SRC_PATH=$(nix-build -E '(import ../.).packages.x86_64-linux.${pname}.src')
+        ${../../scripts/update-go.sh} $SRC_PATH matrix/mautrix-slack/
+      fi
+    '';
+  }
diff --git a/packages/matrix/mautrix-slack/gomod2nix.toml b/packages/matrix/mautrix-slack/gomod2nix.toml
new file mode 100644
index 00000000..af2e98d0
--- /dev/null
+++ b/packages/matrix/mautrix-slack/gomod2nix.toml
@@ -0,0 +1,103 @@
+schema = 3
+
+[mod]
+  [mod."filippo.io/edwards25519"]
+    version = "v1.1.0"
+    hash = "sha256-9ACANrgWZSd5HYPfDZHY8DVbPSC9LOMgy8deq3rDOoc="
+  [mod."github.com/coreos/go-systemd/v22"]
+    version = "v22.5.0"
+    hash = "sha256-E2zXikbmIQImghstLUWuey1YgA0Folu3F+fi5k4hCxA="
+  [mod."github.com/davecgh/go-spew"]
+    version = "v1.1.1"
+    hash = "sha256-nhzSUrE1fCkN0+RL04N4h8jWmRFPPPWbCuDc7Ss0akI="
+  [mod."github.com/gorilla/mux"]
+    version = "v1.8.0"
+    hash = "sha256-s905hpzMH9bOLue09E2JmzPXfIS4HhAlgT7g13HCwKE="
+  [mod."github.com/gorilla/websocket"]
+    version = "v1.5.0"
+    hash = "sha256-EYVgkSEMo4HaVrsWKqnsYRp8SSS8gNf7t+Elva02Ofc="
+  [mod."github.com/lib/pq"]
+    version = "v1.10.9"
+    hash = "sha256-Gl6dLtL+yk6UrTTWfas43aM4lP/pNa2l7+ITXnjQyKs="
+  [mod."github.com/mattn/go-colorable"]
+    version = "v0.1.13"
+    hash = "sha256-qb3Qbo0CELGRIzvw7NVM1g/aayaz4Tguppk9MD2/OI8="
+  [mod."github.com/mattn/go-isatty"]
+    version = "v0.0.19"
+    hash = "sha256-wYQqGxeqV3Elkmn26Md8mKZ/viw598R4Ych3vtt72YE="
+  [mod."github.com/mattn/go-sqlite3"]
+    version = "v1.14.23"
+    hash = "sha256-taGKFZFQlR5++5b2oZ1dYS3RERKv6yh1gniNWhb4egg="
+  [mod."github.com/petermattis/goid"]
+    version = "v0.0.0-20240813172612-4fcff4a6cae7"
+    hash = "sha256-tfb/0LbMHJQsmxwaj2RItXiYn2AVd05E92Z/vp+rJhs="
+  [mod."github.com/pmezard/go-difflib"]
+    version = "v1.0.0"
+    hash = "sha256-/FtmHnaGjdvEIKAJtrUfEhV7EVo5A/eYrtdnUkuxLDA="
+  [mod."github.com/rs/xid"]
+    version = "v1.6.0"
+    hash = "sha256-rJB7h3KuH1DPp5n4dY3MiGnV1Y96A10lf5OUl+MLkzU="
+  [mod."github.com/rs/zerolog"]
+    version = "v1.33.0"
+    hash = "sha256-jT/Y/izhZiCdrDbC/ty83FGs8UQavTU+OW03O4vKFkY="
+  [mod."github.com/skip2/go-qrcode"]
+    version = "v0.0.0-20200617195104-da1b6568686e"
+    hash = "sha256-ST9t4/b7WFXUb8wra4ZYVDNZJGrEykw8dkWhLrxp8F0="
+  [mod."github.com/slack-go/slack"]
+    version = "v0.0.0-20240913184704-a53c45716dc4"
+    hash = "sha256-enLbGnqJE4ohF9MROnrZjnXNAa708DmQq5bTkQ0vRy4="
+    replaced = "github.com/beeper/slackgo"
+  [mod."github.com/stretchr/testify"]
+    version = "v1.9.0"
+    hash = "sha256-uUp/On+1nK+lARkTVtb5RxlW15zxtw2kaAFuIASA+J0="
+  [mod."github.com/tidwall/gjson"]
+    version = "v1.17.3"
+    hash = "sha256-zui8S4qlfFXNLartKynJbYqeM/MW3f3eDbojIvh/KS8="
+  [mod."github.com/tidwall/match"]
+    version = "v1.1.1"
+    hash = "sha256-M2klhPId3Q3T3VGkSbOkYl/2nLHnsG+yMbXkPkyrRdg="
+  [mod."github.com/tidwall/pretty"]
+    version = "v1.2.0"
+    hash = "sha256-esRQGsn2Ee/CiySlwyuOICSLdqUkH4P7u8qXszos8Yc="
+  [mod."github.com/tidwall/sjson"]
+    version = "v1.2.5"
+    hash = "sha256-OYGNolkmL7E1Qs2qrQ3IVpQp5gkcHNU/AB/z2O+Myps="
+  [mod."github.com/yuin/goldmark"]
+    version = "v1.7.4"
+    hash = "sha256-1L0gZyD+AguN8GBy17rs54eFZv7LTU5dcttULEJRabI="
+  [mod."go.mau.fi/util"]
+    version = "v0.8.0"
+    hash = "sha256-7o1p24OH9w0532nv2dC+jrwjWDX9eeuv0m6OFKcIBNc="
+  [mod."go.mau.fi/zeroconfig"]
+    version = "v0.1.3"
+    hash = "sha256-TPwXOQql1MV8pXn6ZPxtkBUHzBCwIngNjrfqTfOSJX4="
+  [mod."golang.org/x/crypto"]
+    version = "v0.27.0"
+    hash = "sha256-8HP4+gr4DbXI22GhdgZmCWr1ijtI9HNLsTcE0kltY9o="
+  [mod."golang.org/x/exp"]
+    version = "v0.0.0-20240909161429-701f63a606c0"
+    hash = "sha256-nB3zQGSyCNU9Z6QP0iYYBpUeu7HKBBXS1z9ba4DxjMQ="
+  [mod."golang.org/x/net"]
+    version = "v0.29.0"
+    hash = "sha256-dH9Rdf5T04KJ4B5WvIZh12ogMbADWiWgIt77nvPTk2k="
+  [mod."golang.org/x/sync"]
+    version = "v0.8.0"
+    hash = "sha256-usvF0z7gq1vsX58p4orX+8WHlv52pdXgaueXlwj2Wss="
+  [mod."golang.org/x/sys"]
+    version = "v0.25.0"
+    hash = "sha256-PXZ9EQZ7SFpcL7d3E1+KGTxziYlHEIZPfoXEbnaVD3I="
+  [mod."golang.org/x/text"]
+    version = "v0.18.0"
+    hash = "sha256-aNvJW4gQs+MTfdz6DZqyyHQS2GJ9W8L8qKPVODPn4+k="
+  [mod."gopkg.in/natefinch/lumberjack.v2"]
+    version = "v2.2.1"
+    hash = "sha256-GaXWRDxhGy4Z4mgE+bJ8OE9SVvYUa9TnNiydnp2s1Ms="
+  [mod."gopkg.in/yaml.v3"]
+    version = "v3.0.1"
+    hash = "sha256-FqL9TKYJ0XkNwJFnq9j0VvJ5ZUU1RvH/52h/f5bkYAU="
+  [mod."maunium.net/go/mauflag"]
+    version = "v1.0.0"
+    hash = "sha256-fYc/WwqE0ev0dvnu5qGmHJsYiSTuWeOTiAVzmQIKWyY="
+  [mod."maunium.net/go/mautrix"]
+    version = "v0.21.0"
+    hash = "sha256-N/bOKAx/klp4LFP99P8jeNaNzgeqZalQgYiJIADJkwA="
diff --git a/packages/matrix/mautrix-slack/source.json b/packages/matrix/mautrix-slack/source.json
new file mode 100644
index 00000000..48aa943e
--- /dev/null
+++ b/packages/matrix/mautrix-slack/source.json
@@ -0,0 +1,12 @@
+{
+  "url": "https://github.com/mautrix/slack",
+  "rev": "52cdb0d9727d1de1ecb32f70ca53315469fe569b",
+  "date": "2024-09-16T14:14:10+03:00",
+  "path": "/nix/store/rkxr63qigiag8m3yp2hbavl3gfqhgrzh-slack",
+  "sha256": "1p0kpqac9in77q6qkls242d5jzw4k0anv5k0y8mxihmxxqm84aj4",
+  "hash": "sha256-RCqCKu69wtgr8mCWbRWYhH9ZmiBC04kNPsfGxBS+E9w=",
+  "fetchLFS": false,
+  "fetchSubmodules": false,
+  "deepClone": false,
+  "leaveDotGit": false
+}