diff --git a/src/client/opamPinCommand.ml b/src/client/opamPinCommand.ml
index fdefab5a999..14a4ac67d80 100644
--- a/src/client/opamPinCommand.ml
+++ b/src/client/opamPinCommand.ml
@@ -153,9 +153,10 @@ let update_config t name pins =
   OpamFile.Pinned.write pin_f pins
 
 let pin name ?version pin_option =
-  log "pin %a to %a"
+  log "pin %a to %a (%a)"
     (slog OpamPackage.Name.to_string) name
-    (slog string_of_pin_option) pin_option;
+    (slog string_of_pin_option) pin_option
+    (slog (string_of_pin_kind @* kind_of_pin_option)) pin_option;
   let t = OpamState.load_state "pin" OpamStateConfig.(!r.current_switch) in
   let pin_f = OpamPath.Switch.pinned t.root t.switch in
   let pin_kind = kind_of_pin_option pin_option in
diff --git a/src/core/opamProcess.ml b/src/core/opamProcess.ml
index 281254eda00..96614388041 100644
--- a/src/core/opamProcess.ml
+++ b/src/core/opamProcess.ml
@@ -535,7 +535,7 @@ let result_summary r =
        try
          Printf.sprintf " \"%s\""
            (List.find
-              Re.(execp (compile (seq [ rep (diff any alpha);
+              Re.(execp (compile (seq [ bos; rep (diff any alpha);
                                         no_case (str "error") ])))
               (List.rev es))
        with Not_found -> ""
diff --git a/src/format/opamTypesBase.ml b/src/format/opamTypesBase.ml
index 76ee648d4ad..fc2d02d7664 100644
--- a/src/format/opamTypesBase.ml
+++ b/src/format/opamTypesBase.ml
@@ -71,7 +71,7 @@ let url_backend_of_pin_kind = function
 
 let looks_like_version_re =
   Re.(compile @@
-      seq [digit; rep @@ diff any (set "/\\"); eos])
+      seq [bos; digit; rep @@ diff any (set "/\\"); eos])
 
 let pin_option_of_string ?kind ?(guess=false) s =
   match kind with