diff --git a/pkgs/servers/http/couchdb/2.0.0.nix b/pkgs/servers/http/couchdb/2.0.0.nix
index 650b9053191..cb630c26688 100644
--- a/pkgs/servers/http/couchdb/2.0.0.nix
+++ b/pkgs/servers/http/couchdb/2.0.0.nix
@@ -5,6 +5,8 @@ stdenv.mkDerivation rec {
   name = "couchdb-${version}";
   version = "2.3.0";
 
+  # when updating this, please consider bumping the OTP version
+  # in all-packages.nix
   src = fetchurl {
     url = "mirror://apache/couchdb/source/${version}/apache-${name}.tar.gz";
     sha256 = "0lpk64n6fip85j1jz59kq20jdliwv6mh8j2h5zyxjn5i8b86hf0b";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 1acc477c066..6ef3249f682 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14235,6 +14235,7 @@ in
 
   couchdb2 = callPackage ../servers/http/couchdb/2.0.0.nix {
     spidermonkey = spidermonkey_1_8_5;
+    erlang = erlangR21;
   };
 
   couchpotato = callPackage ../servers/couchpotato {};