diff --git a/pkgs/servers/web-apps/discourse/default.nix b/pkgs/servers/web-apps/discourse/default.nix
index 893404a6084f..320eac3bc8ce 100644
--- a/pkgs/servers/web-apps/discourse/default.nix
+++ b/pkgs/servers/web-apps/discourse/default.nix
@@ -279,6 +279,7 @@ let
       popd &>/dev/null
 
       redis-server >/dev/null &
+      REDIS_PID=$!
 
       initdb -A trust $NIX_BUILD_TOP/postgres >/dev/null
       postgres -D $NIX_BUILD_TOP/postgres -k $NIX_BUILD_TOP >/dev/null &
@@ -304,6 +305,8 @@ let
 
       bundle exec rake db:migrate >/dev/null
       chmod -R +w tmp
+
+      kill $REDIS_PID
     '';
 
     buildPhase = ''