diff --git a/dune-workspace b/dune-workspace
deleted file mode 100644
index efb20ab..0000000
--- a/dune-workspace
+++ /dev/null
@@ -1,5 +0,0 @@
-(lang dune 2.0)
-
-(env
-  (dev
-    (flags (:standard -warn-error -A))))
diff --git a/src/lib/monorepo/git_store.ml b/src/lib/monorepo/git_store.ml
index 0c98cb0..cefb4b9 100644
--- a/src/lib/monorepo/git_store.ml
+++ b/src/lib/monorepo/git_store.ml
@@ -145,7 +145,7 @@ end
 
 let id_of_repo repo =
   let pp_hex f d =
-    for x = 0 to Cstruct.len d - 1 do
+    for x = 0 to Cstruct.length d - 1 do
       let byte = Cstruct.get_uint8 d x in
       Fmt.pf f "%02x" byte
     done
diff --git a/src/lib/monorepo/opamfile.ml b/src/lib/monorepo/opamfile.ml
index c4aaff0..09c34e2 100644
--- a/src/lib/monorepo/opamfile.ml
+++ b/src/lib/monorepo/opamfile.ml
@@ -1,8 +1,9 @@
-type t = OpamParserTypes.opamfile
+type t = OpamParserTypes.FullPos.opamfile
 type pkg = { name : string; version : string; repo : string }
 
 let get_packages (opam_file : t) =
   let open OpamParserTypes in
+  let opam_file = OpamParser.FullPos.to_opamfile opam_file in
   let pin_depends =
     List.find_map
       (function
@@ -26,11 +27,11 @@ let get_packages (opam_file : t) =
     | List (_, v) -> v
     | _ -> failwith "failed to parse opam")
 
-let marshal = OpamPrinter.opamfile
-let unmarshal t = OpamParser.string t "monorepo.opam"
+let marshal = OpamPrinter.FullPos.opamfile
+let unmarshal t = OpamParser.FullPos.string t "monorepo.opam"
 let digest x = marshal x |> Digest.string |> Digest.to_hex
-let to_yojson f = `String (OpamPrinter.opamfile f)
+let to_yojson f = `String (OpamPrinter.FullPos.opamfile f)
 
 let of_yojson = function
-  | `String s -> Ok (OpamParser.string s "")
+  | `String s -> Ok (OpamParser.FullPos.string s "")
   | _ -> Error "failed to parse opamfile"
diff --git a/src/lib/monorepo/opamfile.mli b/src/lib/monorepo/opamfile.mli
index d2ca8e8..e7d2cc4 100644
--- a/src/lib/monorepo/opamfile.mli
+++ b/src/lib/monorepo/opamfile.mli
@@ -1,4 +1,4 @@
-type t = OpamParserTypes.opamfile
+type t = OpamParserTypes.FullPos.opamfile
 type pkg = { name : string; version : string; repo : string }
 
 val get_packages : t -> pkg list