Fix test failures

tests/referrers.sh

@@ -4,7 +4,7 @@ clearStore
 
 max=500
 
-reference=$NIX_STORE_DIR/abcdef
+reference=$NIX_STORE_DIR/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
 touch $reference
 (echo $reference && echo && echo 0) | nix-store --register-validity 
 
@@ -12,9 +12,9 @@ echo "making registration..."
 
 set +x
 for ((n = 0; n < $max; n++)); do
-    storePath=$NIX_STORE_DIR/$n
+    storePath=$NIX_STORE_DIR/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-$n
     echo -n > $storePath
-    ref2=$NIX_STORE_DIR/$((n+1))
+    ref2=$NIX_STORE_DIR/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-$((n+1))
     if test $((n+1)) = $max; then
         ref2=$reference
     fi
@@ -30,7 +30,7 @@ echo "collecting garbage..."
 ln -sfn $reference "$NIX_STATE_DIR"/gcroots/ref
 nix-store --gc
 
-if [ -n "$(type -p sqlite3)" -a "$(sqlite3 ./test-tmp/db/db.sqlite 'select count(*) from Refs')" -ne 0 ]; then
+if [ -n "$(type -p sqlite3)" -a "$(sqlite3 $NIX_DB_DIR/db.sqlite 'select count(*) from Refs')" -ne 0 ]; then
     echo "referrers not cleaned up"
     exit 1
 fi