# Stdune fails to compile **URL:** \ **Category:** Ecosystem\ **Tags:** install, ocaml-lsp-server, opam, dune\ **Created:** [April 23, 2024, 12:42pm UTC](https://discuss.ocaml.org/t/stdune-fails-to-compile/14542 "2024-04-23T12:42:11Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![pigeonsownme](https://avatars.discourse-cdn.com/v4/letter/p/e95f7d/32.png) [@pigeonsownme](https://discuss.ocaml.org/u/pigeonsownme)\ **Post date:** [April 23, 2024, 12:42pm UTC](https://discuss.ocaml.org/t/stdune-fails-to-compile/14542/1 "2024-04-23T12:42:11Z")
Output of `opam install stdune` : ```auto #=== ERROR while compiling stdune.3.15.0 ======================================# # context 2.1.5 | linux/x86_64 | ocaml.5.1.1 | https://opam.ocaml.org#f2df0b10 # path ~/.opam/default/.opam-switch/build/stdune.3.15.0 # command ~/.opam/opam-init/hooks/sandbox.sh build dune build -p stdune -j 7 @install # exit-code 1 # env-file ~/.opam/log/stdune-953120-c77bb5.env # output-file ~/.opam/log/stdune-953120-c77bb5.out ### output ### # Error: The files /usr/lib/ocaml/dyn/dyn.cmi # [...] # make inconsistent assumptions over interface Pp # (cd _build/default && /usr/bin/ocamlc.opt -w -40 -alert -unstable -g -bin-annot -I otherlibs/stdune/src/.stdune.objs/byte -I /home/willow/.opam/default/lib/csexp -I /home/willow/.opam/default/lib/pp -I /usr/lib/ocaml/dyn -I /usr/lib/ocaml/ordering -I /usr/lib/ocaml/unix -I otherlibs/stdune/dune_filesystem_stubs/.dune_filesystem_stubs.objs/byte -no-alias-deps -open Stdune__ -o otherlibs/stdune[...] # File "otherlibs/stdune/src/exn_with_backtrace.mli", line 1: # Error: The files otherlibs/stdune/src/.stdune.objs/byte/stdune__Result.cmi # and /home/willow/.opam/default/lib/pp/pp.cmi # make inconsistent assumptions over interface Pp # (cd _build/default && /usr/bin/ocamlc.opt -w -40 -alert -unstable -g -bin-annot -I otherlibs/stdune/src/.stdune.objs/byte -I /home/willow/.opam/default/lib/csexp -I /home/willow/.opam/default/lib/pp -I /usr/lib/ocaml/dyn -I /usr/lib/ocaml/ordering -I /usr/lib/ocaml/unix -I otherlibs/stdune/dune_filesystem_stubs/.dune_filesystem_stubs.objs/byte -no-alias-deps -open Stdune__ -o otherlibs/stdune[...] # File "otherlibs/stdune/src/path.mli", line 1: # Error: The files otherlibs/stdune/src/.stdune.objs/byte/stdune__Path_intf.cmi # and /home/willow/.opam/default/lib/pp/pp.cmi # make inconsistent assumptions over interface Pp ``` I’m trying to install `ocaml-lsp-server`, which depends on `stdune`. For some reason, `stdune` always fails to install on my machine… I tried doing this in a fresh opam switch, and I still got the same exact error. Please help ! 😢 ---
**Author:** ![pigeonsownme](https://avatars.discourse-cdn.com/v4/letter/p/e95f7d/32.png) [@pigeonsownme](https://discuss.ocaml.org/u/pigeonsownme)\ **Post date:** [April 23, 2024, 12:46pm UTC](https://discuss.ocaml.org/t/stdune-fails-to-compile/14542/2 "2024-04-23T12:46:01Z")
As of now, I’ve also tried running `opam clean` first, and restarting my computer. ---
**Author:** ![nojb](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/nojb/32/519_2.png) [@nojb](https://discuss.ocaml.org/u/nojb)\ **Post date:** [April 23, 2024, 1:25pm UTC](https://discuss.ocaml.org/t/stdune-fails-to-compile/14542/3 "2024-04-23T13:25:51Z")
> [@pigeonsownme](#): > > ```auto > # Error: The files /usr/lib/ocaml/dyn/dyn.cmi > > ``` This line seems fishy. If you are using OPAM you should not normally see any files installed outside of the OPAM prefix `~/.opam`, like you see here. Most probably you have a mixture of OPAM-installed and system-installed libraries and/or tools. The most typical suspect is `ocamlfind`. Can you print the result of `ocamlfind printconf`? Cheers, Nicolas ---
**Author:** ![pigeonsownme](https://avatars.discourse-cdn.com/v4/letter/p/e95f7d/32.png) [@pigeonsownme](https://discuss.ocaml.org/u/pigeonsownme)\ **Post date:** [April 23, 2024, 1:44pm UTC](https://discuss.ocaml.org/t/stdune-fails-to-compile/14542/4 "2024-04-23T13:44:42Z")
```auto $ ocamlfind printconf Effective configuration: Configuration file: /home/willow/.opam/default/lib/findlib.conf Search path: /usr/lib/ocaml /home/willow/.opam/default/lib Packages will be installed in/removed from: /home/willow/.opam/default/lib META files will be installed in/removed from: the corresponding package directories The standard library is assumed to reside in: /usr/lib/ocaml The ld.conf file can be found here: /usr/lib/ocaml/ld.conf ``` I tried looking for such libraries, and I’m not sure if I have any. Only things I installed throught my package manager are `ocaml`, `ocaml-compiler-libs`, and `opam` (at least, as far as I’m aware). ---
**Author:** ![nojb](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/nojb/32/519_2.png) [@nojb](https://discuss.ocaml.org/u/nojb)\ **Post date:** [April 23, 2024, 1:48pm UTC](https://discuss.ocaml.org/t/stdune-fails-to-compile/14542/5 "2024-04-23T13:48:55Z")
> [@pigeonsownme](#): > > Only things I installed throught my package manager are `ocaml`, `ocaml-compiler-libs`, and `opam` (at least, as far as I’m aware). By chance, did you install Dune with your system package manager? What is the result of `ocamlfind query dyn`? Cheers, Nicolas ---
**Author:** ![pigeonsownme](https://avatars.discourse-cdn.com/v4/letter/p/e95f7d/32.png) [@pigeonsownme](https://discuss.ocaml.org/u/pigeonsownme)\ **Post date:** [April 23, 2024, 2:02pm UTC](https://discuss.ocaml.org/t/stdune-fails-to-compile/14542/6 "2024-04-23T14:02:33Z")
```auto $ ocamlfind query dyn /home/willow/.opam/default/lib/dyn ``` According to my package manager, I didn’t install dune through it. Thanks for your time, by the way. ---
**Author:** ![nojb](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/nojb/32/519_2.png) [@nojb](https://discuss.ocaml.org/u/nojb)\ **Post date:** [April 23, 2024, 2:14pm UTC](https://discuss.ocaml.org/t/stdune-fails-to-compile/14542/7 "2024-04-23T14:14:11Z")
> [@pigeonsownme](#): > > According to my package manager, I didn’t install dune through it. OK. We haven’t figured out why you have a few libraries installed in `/usr/lib/ocaml`, but if you just want to get things working, you could go ahead and simply delete `/usr/lib/ocaml/dyn`, `/usr/lib/ocaml/ordering` (these are the ones I see in your log, there may be others) and try again. Alternatively, you may want to use an OCaml compiler installed via OPAM (ie `opam switch create ...`) which will be installed in `~/.opam` and will completely insulate you from your existing system installation. > [@pigeonsownme](#): > > Thanks for your time, by the way. Sure, you are welcome. Cheers, Nicolas