diff --git a/tests/Makefile.am b/tests/Makefile.am
index a6559a71..36c1d2bc 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,11 +1,23 @@
-TESTS_ENVIRONMENT = HYDRA_DBI="dbi:SQLite:db.sqlite" HYDRA_DATA="$(top_srcdir)/tests/data" HYDRA_HOME="$(topsrc_dir)/src"
+TESTS_ENVIRONMENT = \
+  HYDRA_DBI="dbi:SQLite:db.sqlite" \
+  HYDRA_DATA="$(top_srcdir)/tests/data" \
+  HYDRA_HOME="$(topsrc_dir)/src" \
+  NIX_REMOTE= \
+  NIX_STATE_DIR=$(top_srcdir)/tests/nix/var \
+  NIX_DATA_DIR=$(top_srcdir)/tests/nix/var \
+  NIX_STORE_DIR=$(top_srcdir)/tests/nix/store \
+  perl -w 
+
 TESTS = \
   query-all-tables.pl
 
-$(TESTS) : db.sqlite data
+$(TESTS) : db.sqlite dirs
 
 db.sqlite : $(top_srcdir)/src/sql/hydra-sqlite.sql
 	sqlite3 db.sqlite <  $(top_srcdir)/src/sql/hydra-sqlite.sql
 
-data :
+dirs :
 	mkdir -p data
+	mkdir -p nix
+	mkdir -p nix/store
+	mkdir -p nix/var