diff --git a/pkgs/servers/sql/postgresql/ext/pg_auto_failover.nix b/pkgs/servers/sql/postgresql/ext/pg_auto_failover.nix
index f37e347e89a..ae72b164b84 100644
--- a/pkgs/servers/sql/postgresql/ext/pg_auto_failover.nix
+++ b/pkgs/servers/sql/postgresql/ext/pg_auto_failover.nix
@@ -1,8 +1,5 @@
 { stdenv, fetchFromGitHub, postgresql, openssl, zlib, readline }:
 
-if stdenv.lib.versionOlder postgresql.version "10"
-then throw "pg_auto_failover not supported for PostgreSQL ${postgresql.version}"
-else
 stdenv.mkDerivation rec {
   pname = "pg_auto_failover";
   version = "1.0.3";
@@ -29,5 +26,6 @@ stdenv.mkDerivation rec {
     maintainers = [ maintainers.marsam ];
     platforms = postgresql.meta.platforms;
     license = licenses.postgresql;
+    broken = versionOlder postgresql.version "10";
   };
 }
diff --git a/pkgs/servers/sql/postgresql/ext/pipelinedb.nix b/pkgs/servers/sql/postgresql/ext/pipelinedb.nix
index 01dcd54d95e..4a80e5cafcb 100644
--- a/pkgs/servers/sql/postgresql/ext/pipelinedb.nix
+++ b/pkgs/servers/sql/postgresql/ext/pipelinedb.nix
@@ -1,8 +1,5 @@
 { stdenv, fetchFromGitHub, postgresql, zeromq, openssl }:
 
-if stdenv.lib.versionOlder postgresql.version "10"
-then throw "PipelineDB not supported for PostgreSQL ${postgresql.version}"
-else
 stdenv.mkDerivation rec {
   pname = "pipelinedb";
   version = "1.0.0-13";
@@ -35,5 +32,6 @@ stdenv.mkDerivation rec {
     license = licenses.asl20;
     platforms = postgresql.meta.platforms;
     maintainers = [ maintainers.marsam ];
+    broken = versionOlder postgresql.version "10";
   };
 }