diff --git a/lib.nix b/lib.nix
index 9d12207..d0ff630 100644
--- a/lib.nix
+++ b/lib.nix
@@ -146,7 +146,6 @@ in
           PGDATA=$RUNTIME_PATH/${name}
           PGHOST=$RUNTIME_PATH/${name}
           PGPORT=${builtins.toString port}
-          mkdir -p "$PGHOST"
           echo "Starting postgres with PGDATA=''${PGDATA} PGHOST=''${PGHOST} PGPORT=''${PGPORT}"
           export PGDATA PGHOST PGPORT
           ${setupScript}/bin/setup-postgres