diff --git a/pkgs/development/beam-modules/default.nix b/pkgs/development/beam-modules/default.nix
index 6c33298ff926..6cfa2721bfcd 100644
--- a/pkgs/development/beam-modules/default.nix
+++ b/pkgs/development/beam-modules/default.nix
@@ -38,6 +38,7 @@ let
       mixRelease = callPackage ./mix-release.nix { };
 
       erlang-ls = callPackage ./erlang-ls { };
+      erlfmt = callPackage ./erlfmt { };
 
       # BEAM-based languages.
       elixir = elixir_1_12;
diff --git a/pkgs/development/beam-modules/erlfmt/default.nix b/pkgs/development/beam-modules/erlfmt/default.nix
new file mode 100644
index 000000000000..c903906802e3
--- /dev/null
+++ b/pkgs/development/beam-modules/erlfmt/default.nix
@@ -0,0 +1,20 @@
+{ fetchFromGitHub, rebar3Relx, lib }:
+
+rebar3Relx rec {
+  name = "erlfmt";
+  version = "1.0.0";
+  releaseType = "escript";
+  src = fetchFromGitHub {
+    owner = "WhatsApp";
+    repo = "erlfmt";
+    sha256 = "19apbs9xr4j8qjb3sv9ilknqjw4a7bvp8jvwrjiwvwnxzzm2kjm6";
+    rev = "v${version}";
+  };
+  meta = with lib; {
+    homepage = "https://github.com/WhatsApp/erlfmt";
+    description = "An automated code formatter for Erlang";
+    platforms = platforms.unix;
+    license = licenses.asl20;
+    maintainers = with lib.maintainers; [ dlesl ];
+  };
+}
diff --git a/pkgs/development/beam-modules/rebar3-release.nix b/pkgs/development/beam-modules/rebar3-release.nix
index 98d10cb87c4f..16344f2f194c 100644
--- a/pkgs/development/beam-modules/rebar3-release.nix
+++ b/pkgs/development/beam-modules/rebar3-release.nix
@@ -93,10 +93,10 @@ let
       inherit (erlang.meta) platforms;
     } // meta;
 
-    passthru = {
+    passthru = ({
       packageName = name;
       env = shell self;
-   };
+    } // (if attrs ? passthru then attrs.passthru else {}));
   } // customPhases);
 in
   fix pkg
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c67ee7f65360..ccf3ae44ae4d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12331,7 +12331,7 @@ in
   erlang_nox = beam_nox.interpreters.erlang;
 
   inherit (beam.packages.erlang)
-    erlang-ls
+    erlang-ls erlfmt
     rebar rebar3 rebar3WithPlugins
     fetchHex beamPackages;