opam-mandate only one Ocsipersist backend

vasilisp · vasilisp · commit 8cff792b2bb3 · 2016-07-12T16:11:54.000+02:00
diff --git a/opam b/opam
@@ -28,11 +28,12 @@ depends: [
   "pcre"
   "cryptokit"
   "tyxml" {> "3.6.0"}
-  "dbm"
-  "sqlite3"
-  "pgocaml" {>= "2.2"}
+  ("dbm" | "sqlite3" | "pgocaml")
   "ipaddr" {>= "2.1"}
   "camlp4"
 ]
 depopts: "camlzip"
-conflicts: "camlzip" {< "1.04"}
+conflicts: [
+  "camlzip" {< "1.04"}
+  "pgocaml" {< "2.2"}
+]
