ocaml/dune

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A composable build system for OCaml.

Stars: 1.9k
Forks: 500
Open beginner issues: 8
Indexed issues: 911
Avg merge: 15h 21m
Merged PRs (30d): 277

Dominant language: OCaml
License: MIT
Last GitHub push: Sep 20, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

Open All

911 open issues indexed

Design a CLI interface for discretionary tools Open

dev tools package management

Difficulty 5/5 Over a week Newbie friendliness 25/100

ocaml/dune#16430 · Opened Sep 18, 2026
Handle `ocamllex` warnings (OCaml 5.6+) Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

ocaml/dune#16429 · Opened Sep 18, 2026
Dune installed via `opam` crashes on `dune init` with SIGSEGV on macOS Open

macos needs-investigation

Difficulty 3/5 1-2 days Newbie friendliness 64/100

ocaml/dune#16417 · 3 comments · Opened Sep 16, 2026
Sandboxes are not cleared when dune is interrupted Open

engine sandboxing

Difficulty 3/5 1-2 days Newbie friendliness 55/100

ocaml/dune#16416 · Opened Sep 16, 2026
Dune should pass the `-Werror=unguarded-availability-new` warning Open

c-bindings

Difficulty 4/5 3-5 days Newbie friendliness 52/100

ocaml/dune#16413 · Opened Sep 15, 2026
Lots of zombies maybe due to dune not reaping its children properly Open

needs-investigation

Difficulty 4/5 3-5 days Newbie friendliness 42/100

ocaml/dune#16409 · Opened Sep 14, 2026
`generate_opam_files` broken in 3.24 Open

build

Difficulty 3/5 1-2 days Newbie friendliness 65/100

ocaml/dune#16375 · 6 comments · Opened Sep 12, 2026
odoc: can't link between packages Open

odoc

Difficulty 3/5 1-2 days Newbie friendliness 68/100

ocaml/dune#16363 · 11 comments · Opened Sep 10, 2026
directory completion candidates still generate spaces Open

cli

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

ocaml/dune#16357 · Opened Sep 8, 2026
Allow specifying per-mode linker flags Open

build

Difficulty 3/5 1-2 days Newbie friendliness 72/100

ocaml/dune#16324 · 4 comments · Opened Sep 4, 2026
Semantics of `--no-build` when package management is enabled Open

package management

Difficulty 5/5 Over a week Newbie friendliness 30/100

ocaml/dune#16312 · Opened Sep 3, 2026
Allow test to fail on compilation Open

proposal test

Difficulty 4/5 3-5 days Newbie friendliness 52/100

ocaml/dune#16311 · 1 comment · Opened Sep 3, 2026
`describe workspace` should include melange targets Open

describe melange

Difficulty 3/5 1-2 days Newbie friendliness 68/100

ocaml/dune#16299 · Opened Sep 2, 2026
Exit with distinct code when the global lock blocks execution Open

cli

ocaml/dune#16289 · 1 comment · 1 reaction · 1 assignee · Opened Aug 31, 2026
Regression: some setting of `OCAMLFIND_CONF` now raises an error Open

regression

Difficulty 3/5 1-2 days Newbie friendliness 67/100

ocaml/dune#16226 · 1 comment · Opened Aug 28, 2026
`_build/default` in `compile_commands.json`'s "`directory"` value Open

c-bindings

Difficulty 3/5 1-2 days Newbie friendliness 68/100

ocaml/dune#16225 · 3 comments · Opened Aug 27, 2026
Build time unevenly updates during build Open

tui

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ocaml/dune#16220 · Opened Aug 27, 2026
Improve error message when connecting to batch build via RPC Open

enhancement rpc

Difficulty 3/5 1-2 days Newbie friendliness 68/100

ocaml/dune#16219 · Opened Aug 27, 2026
dune subst fails with opam pin -k path when no version can be determined Open

build

Difficulty 3/5 1-2 days Newbie friendliness 67/100

ocaml/dune#16215 · 4 comments · Opened Aug 26, 2026
Present an informative error for invalid use of declared discretionary tools in build rules Open

dev tools package management

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ocaml/dune#16196 · Opened Aug 25, 2026
Support constraining discretionary tools to integrate with existing lock directories Open

dev tools package management

Difficulty 5/5 Over a week Newbie friendliness 35/100

ocaml/dune#16195 · Opened Aug 25, 2026
Enable building discretionary tools in isolation from project dependencies Open

dev tools package management

Difficulty 5/5 Over a week Newbie friendliness 35/100

ocaml/dune#16193 · Opened Aug 25, 2026
Support putting all tooling binaries into shell environment Open

dev tools package management

Difficulty 4/5 3-5 days Newbie friendliness 45/100

ocaml/dune#16191 · Opened Aug 25, 2026
Ensure exec lookup does not fallback to the environment when the name of a managed tool is invoked Open

dev tools package management

Difficulty 4/5 3-5 days Newbie friendliness 52/100

ocaml/dune#16190 · Opened Aug 25, 2026
Support specifying subset of binaries for installation from packages for discretionary tools Open

dev tools package management

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ocaml/dune#16189 · Opened Aug 25, 2026
Support specifying versions in discretionary tools stanzas Open

dev tools package management

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ocaml/dune#16188 · Opened Aug 25, 2026
Prevent system fallback for dune tool integration subcommands when package management is enabled Open

package management tools

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ocaml/dune#16187 · Opened Aug 25, 2026
Implement basic stanza configuration for discretionary tools Open

dev tools package management

ocaml/dune#16186 · 1 assignee · Opened Aug 25, 2026
Design basic stanza configuration for discretionary tools Open

dev tools package management

ocaml/dune#16185 · 10 comments · 1 assignee · Opened Aug 25, 2026
installing dune with DUNE_BUILD_DIR set fails. Open

build

Difficulty 3/5 1-2 days Newbie friendliness 65/100

ocaml/dune#16112 · 1 comment · Opened Aug 23, 2026
A cram test that writes to one of its own files mutates the shared cache entry for that content Open

cram shared-cache

Difficulty 4/5 3-5 days Newbie friendliness 55/100

ocaml/dune#16077 · 2 comments · Opened Aug 21, 2026
The shared cache misses when the build directory is named by its absolute path Open

macos shared-cache

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ocaml/dune#16072 · Opened Aug 21, 2026
Editing a `(private_modules ...)` interface does not rebuild consumers; the build then fails with "inconsistent assumptions over interface" Open

build

ocaml/dune#16071 · 1 reaction · 2 assignees · Opened Aug 21, 2026
It seems impossible for a library to depend on a binary in a reasonable way Open

dune-site-plugin question

Difficulty 5/5 Over a week Newbie friendliness 48/100

ocaml/dune#16050 · 6 comments · Opened Aug 19, 2026
Running dune inside a cram test populates the workspace trace file Open

docs

Difficulty 3/5 1-2 days Newbie friendliness 58/100

ocaml/dune#15872 · 14 comments · 2 reactions · Opened Aug 14, 2026
Support for `dune top` over RPC Open

rpc watch mode

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ocaml/dune#15770 · Opened Aug 11, 2026
Support `dune rules` over RPC Open

rpc watch mode

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ocaml/dune#15768 · Opened Aug 11, 2026
Support `dune ocaml` subcommands over RPC Open

rpc watch mode

Difficulty 4/5 3-5 days Newbie friendliness 50/100

ocaml/dune#15767 · Opened Aug 11, 2026
Support `dune installed-libraries` over RPC Open

rpc watch mode

Difficulty 4/5 3-5 days Newbie friendliness 55/100

ocaml/dune#15766 · Opened Aug 11, 2026
Support `dune clean` over RPC Open

rpc watch mode

Difficulty 3/5 1-2 days Newbie friendliness 55/100

ocaml/dune#15765 · 1 comment · Opened Aug 11, 2026
Support `dune printenv` over RPC Open

rpc watch mode

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ocaml/dune#15764 · Opened Aug 11, 2026
Consistent RPC support for all sub commands Open

rpc watch mode

Difficulty 5/5 Over a week Newbie friendliness 25/100

ocaml/dune#15763 · 1 reaction · Opened Aug 11, 2026
`dune tools install ocamllsp` sometimes fails with `server error (error kind: Code_error)` Open

dev tools package management

Difficulty 4/5 3-5 days Newbie friendliness 38/100

ocaml/dune#15756 · 3 comments · Opened Aug 10, 2026
It looks like --force doesn't rerun cram tests. Should it? Open

question

Difficulty 3/5 1-2 days Newbie friendliness 55/100

ocaml/dune#15755 · 8 comments · 1 reaction · Opened Aug 10, 2026
RPC clients connecting to an abandoned socket should fail gracefully Open

rpc

Difficulty 3/5 1-2 days Newbie friendliness 68/100

ocaml/dune#15676 · Opened Aug 4, 2026
pkg: retry transient Git fetch failures Open

package management

Difficulty 3/5 1-2 days Newbie friendliness 62/100

ocaml/dune#15667 · 3 comments · Opened Aug 3, 2026
Build fails with `Unbound module Stdlib` when a project uses menhir with package management Open

macos menhir package management build failures

ocaml/dune#15642 · 3 comments · 1 reaction · 1 assignee · Opened Aug 1, 2026
Improve `dune describe` to provide informations on executable compilation `mode` Open

describe

Difficulty 5/5 Over a week Newbie friendliness 35/100

ocaml/dune#15637 · 2 comments · Opened Jul 31, 2026
Support `dune describe`through the RPC Open

describe rpc

Difficulty 3/5 1-2 days Newbie friendliness 58/100

ocaml/dune#15631 · Opened Jul 31, 2026
add `@pkg-source` alias to populate package sources Open

package management

Difficulty 4/5 3-5 days Newbie friendliness 45/100

ocaml/dune#15628 · Opened Jul 30, 2026

ocaml/dune

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