diff --git a/metadata/md5-cache/dev-ml/dune-3.9.1 b/metadata/md5-cache/dev-ml/dune-3.9.1
new file mode 100644
index 0000000000000..1acc76961a503
--- /dev/null
+++ b/metadata/md5-cache/dev-ml/dune-3.9.1
@@ -0,0 +1,15 @@
+DEFINED_PHASES=compile configure install prepare
+DEPEND=>=dev-lang/ocaml-4.08:= emacs? ( >=app-editors/emacs-23.1:* )
+DESCRIPTION=A composable build system for OCaml
+EAPI=8
+HOMEPAGE=https://github.com/ocaml/dune
+INHERIT=multiprocessing elisp-common
+IUSE=emacs
+KEYWORDS=~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~x86
+LICENSE=MIT
+RDEPEND=>=dev-lang/ocaml-4.08:= emacs? ( >=app-editors/emacs-23.1:* )
+RESTRICT=strip test
+SLOT=0/3.9.1
+SRC_URI=https://github.com/ocaml/dune/archive/3.9.1.tar.gz -> dune-3.9.1.tar.gz
+_eclasses_=multiprocessing	b4e253ab22cef7b1085e9b67c7a3b730	elisp-common	dde4f515dde15603a26a3755438e9c78
+_md5_=a722245d691d8793435c53dfb0200c6b
diff --git a/metadata/md5-cache/dev-ml/dune-build-info-3.9.1 b/metadata/md5-cache/dev-ml/dune-build-info-3.9.1
new file mode 100644
index 0000000000000..f4eee9ada37f0
--- /dev/null
+++ b/metadata/md5-cache/dev-ml/dune-build-info-3.9.1
@@ -0,0 +1,16 @@
+BDEPEND=dev-lang/ocaml dev-ml/dune
+DEFINED_PHASES=compile configure install test
+DEPEND=>=dev-ml/dune-3.5 >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+DESCRIPTION=Embed locations informations inside executable and libraries
+EAPI=8
+HOMEPAGE=https://github.com/ocaml/dune
+INHERIT=dune multiprocessing
+IUSE=+ocamlopt
+KEYWORDS=~amd64 ~ppc64 ~x86
+LICENSE=MIT
+RDEPEND=>=dev-ml/dune-3.5 >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+RESTRICT=test
+SLOT=0/3.9.1
+SRC_URI=https://github.com/ocaml/dune/archive/3.9.1.tar.gz -> dune-3.9.1.tar.gz
+_eclasses_=edo	c0eb9cbe6b0bd01fcb4918f12598a4d3	multiprocessing	b4e253ab22cef7b1085e9b67c7a3b730	dune	beddc7cde467b2e48afc78a87d042c01
+_md5_=816d8969be6d60355b46cabdb83c6acd
diff --git a/metadata/md5-cache/dev-ml/dune-configurator-3.9.1 b/metadata/md5-cache/dev-ml/dune-configurator-3.9.1
new file mode 100644
index 0000000000000..ec39aee037034
--- /dev/null
+++ b/metadata/md5-cache/dev-ml/dune-configurator-3.9.1
@@ -0,0 +1,16 @@
+BDEPEND=>=dev-ml/dune-3.5 dev-lang/ocaml dev-ml/dune
+DEFINED_PHASES=compile configure install prepare test
+DEPEND=>=dev-ml/csexp-1.5:=[ocamlopt?] >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+DESCRIPTION=Helper library for gathering system configuration
+EAPI=8
+HOMEPAGE=https://github.com/ocaml/dune
+INHERIT=dune multiprocessing
+IUSE=+ocamlopt
+KEYWORDS=~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~x86
+LICENSE=Apache-2.0
+RDEPEND=>=dev-ml/csexp-1.5:=[ocamlopt?] >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+RESTRICT=test
+SLOT=0/3.9.1
+SRC_URI=https://github.com/ocaml/dune/archive/3.9.1.tar.gz -> dune-3.9.1.tar.gz
+_eclasses_=edo	c0eb9cbe6b0bd01fcb4918f12598a4d3	multiprocessing	b4e253ab22cef7b1085e9b67c7a3b730	dune	beddc7cde467b2e48afc78a87d042c01
+_md5_=fa5901cee25b3915bf8128fc8661546d
diff --git a/metadata/md5-cache/dev-ml/dune-private-libs-3.9.1 b/metadata/md5-cache/dev-ml/dune-private-libs-3.9.1
new file mode 100644
index 0000000000000..480319bb45615
--- /dev/null
+++ b/metadata/md5-cache/dev-ml/dune-private-libs-3.9.1
@@ -0,0 +1,16 @@
+BDEPEND=>=dev-ml/dune-3.5 dev-lang/ocaml dev-ml/dune
+DEFINED_PHASES=compile configure install test
+DEPEND=>=dev-ml/csexp-1.5:=[ocamlopt?] dev-ml/pp:=[ocamlopt?] ~dev-ml/dyn-3.9.1:=[ocamlopt?] ~dev-ml/stdune-3.9.1:=[ocamlopt?] >=dev-lang/ocaml-4.08 >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+DESCRIPTION=Private libraries of Dune
+EAPI=8
+HOMEPAGE=https://github.com/ocaml/dune
+INHERIT=dune multiprocessing
+IUSE=+ocamlopt
+KEYWORDS=~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~x86
+LICENSE=Apache-2.0
+RDEPEND=>=dev-ml/csexp-1.5:=[ocamlopt?] dev-ml/pp:=[ocamlopt?] ~dev-ml/dyn-3.9.1:=[ocamlopt?] ~dev-ml/stdune-3.9.1:=[ocamlopt?] >=dev-lang/ocaml-4.08 >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+RESTRICT=test
+SLOT=0/3.9.1
+SRC_URI=https://github.com/ocaml/dune/archive/3.9.1.tar.gz -> dune-3.9.1.tar.gz
+_eclasses_=edo	c0eb9cbe6b0bd01fcb4918f12598a4d3	multiprocessing	b4e253ab22cef7b1085e9b67c7a3b730	dune	beddc7cde467b2e48afc78a87d042c01
+_md5_=4c9498458190eaeeae95329707d2571d
diff --git a/metadata/md5-cache/dev-ml/dune-site-3.9.1 b/metadata/md5-cache/dev-ml/dune-site-3.9.1
new file mode 100644
index 0000000000000..657093ac44c4e
--- /dev/null
+++ b/metadata/md5-cache/dev-ml/dune-site-3.9.1
@@ -0,0 +1,16 @@
+BDEPEND=dev-lang/ocaml dev-ml/dune
+DEFINED_PHASES=compile configure install test
+DEPEND=~dev-ml/dune-private-libs-3.9.1:=[ocamlopt=] >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+DESCRIPTION=Embed locations informations inside executable and libraries
+EAPI=8
+HOMEPAGE=https://github.com/ocaml/dune
+INHERIT=dune multiprocessing
+IUSE=+ocamlopt
+KEYWORDS=~amd64 ~arm ~arm64 ~ppc ~ppc64 ~x86
+LICENSE=MIT
+RDEPEND=~dev-ml/dune-private-libs-3.9.1:=[ocamlopt=] >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+RESTRICT=test
+SLOT=0/3.9.1
+SRC_URI=https://github.com/ocaml/dune/archive/3.9.1.tar.gz -> dune-3.9.1.tar.gz
+_eclasses_=edo	c0eb9cbe6b0bd01fcb4918f12598a4d3	multiprocessing	b4e253ab22cef7b1085e9b67c7a3b730	dune	beddc7cde467b2e48afc78a87d042c01
+_md5_=beb7b8dac5f867df30853d7160e6481e
diff --git a/metadata/md5-cache/dev-ml/dyn-3.9.1 b/metadata/md5-cache/dev-ml/dyn-3.9.1
new file mode 100644
index 0000000000000..12a17ac06bc63
--- /dev/null
+++ b/metadata/md5-cache/dev-ml/dyn-3.9.1
@@ -0,0 +1,16 @@
+BDEPEND=>=dev-ml/dune-3.5 dev-lang/ocaml dev-ml/dune
+DEFINED_PHASES=compile configure install test
+DEPEND=~dev-ml/ordering-3.9.1:= dev-ml/pp:= >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+DESCRIPTION=Dynamic type
+EAPI=8
+HOMEPAGE=https://github.com/ocaml/dune
+INHERIT=dune multiprocessing
+IUSE=+ocamlopt
+KEYWORDS=~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~x86
+LICENSE=Apache-2.0
+RDEPEND=~dev-ml/ordering-3.9.1:= dev-ml/pp:= >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+RESTRICT=test
+SLOT=0/3.9.1
+SRC_URI=https://github.com/ocaml/dune/archive/3.9.1.tar.gz -> dune-3.9.1.tar.gz
+_eclasses_=edo	c0eb9cbe6b0bd01fcb4918f12598a4d3	multiprocessing	b4e253ab22cef7b1085e9b67c7a3b730	dune	beddc7cde467b2e48afc78a87d042c01
+_md5_=511ed694c22c345f58ca5282be17d2df
diff --git a/metadata/md5-cache/dev-ml/ordering-3.9.1 b/metadata/md5-cache/dev-ml/ordering-3.9.1
new file mode 100644
index 0000000000000..9f5ef4232669b
--- /dev/null
+++ b/metadata/md5-cache/dev-ml/ordering-3.9.1
@@ -0,0 +1,16 @@
+BDEPEND=>=dev-ml/dune-3.5 dev-lang/ocaml dev-ml/dune
+DEFINED_PHASES=compile configure install test
+DEPEND=>=dev-lang/ocaml-4.08 >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+DESCRIPTION=Element ordering
+EAPI=8
+HOMEPAGE=https://github.com/ocaml/dune
+INHERIT=dune multiprocessing
+IUSE=+ocamlopt
+KEYWORDS=~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~x86
+LICENSE=Apache-2.0
+RDEPEND=>=dev-lang/ocaml-4.08 >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+RESTRICT=test
+SLOT=0/3.9.1
+SRC_URI=https://github.com/ocaml/dune/archive/3.9.1.tar.gz -> dune-3.9.1.tar.gz
+_eclasses_=edo	c0eb9cbe6b0bd01fcb4918f12598a4d3	multiprocessing	b4e253ab22cef7b1085e9b67c7a3b730	dune	beddc7cde467b2e48afc78a87d042c01
+_md5_=7e0204472e648a15dcddf5197c060698
diff --git a/metadata/md5-cache/dev-ml/stdune-3.9.1 b/metadata/md5-cache/dev-ml/stdune-3.9.1
new file mode 100644
index 0000000000000..6c2536e57be2e
--- /dev/null
+++ b/metadata/md5-cache/dev-ml/stdune-3.9.1
@@ -0,0 +1,16 @@
+BDEPEND=>=dev-ml/dune-3.5 dev-lang/ocaml dev-ml/dune
+DEFINED_PHASES=compile configure install test
+DEPEND=dev-ml/pp:=[ocamlopt?] ~dev-ml/dyn-3.9.1:=[ocamlopt?] ~dev-ml/ordering-3.9.1:=[ocamlopt?] >=dev-ml/csexp-1.5:=[ocamlopt?] !<dev-ml/dune-private-libs-3 >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+DESCRIPTION=Dune's unstable standard library
+EAPI=8
+HOMEPAGE=https://github.com/ocaml/dune
+INHERIT=dune multiprocessing
+IUSE=+ocamlopt
+KEYWORDS=~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~x86
+LICENSE=Apache-2.0
+RDEPEND=dev-ml/pp:=[ocamlopt?] ~dev-ml/dyn-3.9.1:=[ocamlopt?] ~dev-ml/ordering-3.9.1:=[ocamlopt?] >=dev-ml/csexp-1.5:=[ocamlopt?] !<dev-ml/dune-private-libs-3 >=dev-lang/ocaml-4:=[ocamlopt?] dev-ml/dune:=
+RESTRICT=test
+SLOT=0/3.9.1
+SRC_URI=https://github.com/ocaml/dune/archive/3.9.1.tar.gz -> dune-3.9.1.tar.gz
+_eclasses_=edo	c0eb9cbe6b0bd01fcb4918f12598a4d3	multiprocessing	b4e253ab22cef7b1085e9b67c7a3b730	dune	beddc7cde467b2e48afc78a87d042c01
+_md5_=c7c0debae68bed48faef4a88e6c550e9
diff --git a/metadata/pkg_desc_index b/metadata/pkg_desc_index
index b7d20a9e37c16..92fcfd52a45f9 100644
--- a/metadata/pkg_desc_index
+++ b/metadata/pkg_desc_index
@@ -5690,13 +5690,13 @@ dev-ml/csexp 1.3.2-r1 1.5.1 1.5.2: Parsing and printing of S-expressions in Cano
 dev-ml/cudf 0.9-r2 0.10: Library to parse, pretty print, and evaluate CUDF documents
 dev-ml/curses 1.0.10 1.0.11: Bindings to ncurses
 dev-ml/dose3 7.0.0: Library to perform analysis on package repositories
-dev-ml/dune 2.8.4 2.9.1 2.9.3-r3 3.0.3-r1 3.1.1 3.2.0 3.5.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0: A composable build system for OCaml
-dev-ml/dune-build-info 2.9.1 2.9.3 3.2.0 3.6.1 3.7.0 3.7.1 3.8.0 3.9.0: Embed locations informations inside executable and libraries
-dev-ml/dune-configurator 2.8.4 2.9.1 2.9.3 3.0.3-r1 3.2.0 3.6.1 3.7.0 3.7.1 3.8.0 3.9.0: Helper library for gathering system configuration
-dev-ml/dune-private-libs 2.8.4 2.9.1 2.9.3 3.0.3-r1 3.2.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0: Private libraries of Dune
-dev-ml/dune-site 2.9.1 2.9.3 3.0.3 3.2.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0: Embed locations informations inside executable and libraries
+dev-ml/dune 2.8.4 2.9.1 2.9.3-r3 3.0.3-r1 3.1.1 3.2.0 3.5.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0 3.9.1: A composable build system for OCaml
+dev-ml/dune-build-info 2.9.1 2.9.3 3.2.0 3.6.1 3.7.0 3.7.1 3.8.0 3.9.0 3.9.1: Embed locations informations inside executable and libraries
+dev-ml/dune-configurator 2.8.4 2.9.1 2.9.3 3.0.3-r1 3.2.0 3.6.1 3.7.0 3.7.1 3.8.0 3.9.0 3.9.1: Helper library for gathering system configuration
+dev-ml/dune-private-libs 2.8.4 2.9.1 2.9.3 3.0.3-r1 3.2.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0 3.9.1: Private libraries of Dune
+dev-ml/dune-site 2.9.1 2.9.3 3.0.3 3.2.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0 3.9.1: Embed locations informations inside executable and libraries
 dev-ml/duration 0.1.3: Duration - conversions to various time units
-dev-ml/dyn 3.0.3-r1 3.2.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0: Dynamic type
+dev-ml/dyn 3.0.3-r1 3.2.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0 3.9.1: Dynamic type
 dev-ml/easy-format 1.2.0: Pretty-printing library for OCaml
 dev-ml/expect_test_helpers_core 0.15.0-r1 0.16.0: Helpers for writing expectation tests
 dev-ml/extlib 1.7.7 1.7.7-r1 1.7.8 1.7.9: Standard library extensions for O'Caml
@@ -5779,7 +5779,7 @@ dev-ml/opam-installer 2.0.9-r1 2.0.10-r1 2.1.2-r1 2.1.3: Core installer for opam
 dev-ml/opam-repository 2.0.9 2.0.10 2.1.2 2.1.3: opam repository libraries
 dev-ml/opam-solver 2.0.9 2.0.10 2.1.2 2.1.3: opam solver
 dev-ml/opam-state 2.0.9 2.0.10 2.1.2 2.1.3: opam state libraries
-dev-ml/ordering 3.0.3 3.2.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0: Element ordering
+dev-ml/ordering 3.0.3 3.2.0 3.6.1 3.6.2 3.7.0 3.7.1 3.8.0 3.9.0 3.9.1: Element ordering
 dev-ml/ounit2 2.2.3 2.2.4 2.2.6: Unit testing framework for OCaml
 dev-ml/parmap 1.2 1.2.1 1.2.3 1.2.4-r1 1.2.5: Library to exploit multicore architectures for OCaml programs
 dev-ml/parsexp 0.14.0 0.14.1 0.15.0 0.16.0: S-expression parsing library
@@ -5850,7 +5850,7 @@ dev-ml/splittable_random 0.14.0 0.15.0 0.16.0: PRNG that can be split into indep
 dev-ml/stdcompat 19: Compatibility module for OCaml standard library
 dev-ml/stdio 0.14.0-r2 0.15.0-r1 0.16.0: Standard IO Library for OCaml
 dev-ml/stdlib-shims 0.2.0 0.3.0: Pure OCaml library that allows replacing Pervasives with Stdlib before 4.08
-dev-ml/stdune 3.0.3-r2 3.2.0-r1 3.6.1-r1 3.6.2-r1 3.7.0-r1 3.7.1 3.8.0 3.9.0: Dune's unstable standard library
+dev-ml/stdune 3.0.3-r2 3.2.0-r1 3.6.1-r1 3.6.2-r1 3.7.0-r1 3.7.1 3.8.0 3.9.0 3.9.1: Dune's unstable standard library
 dev-ml/textutils 0.14.0 0.15.0 0.16.0: Text output utilities
 dev-ml/textutils_kernel 0.15.0 0.16.0: Text output utilities
 dev-ml/time_now 0.14.0 0.15.0 0.16.0: Reports the current time
diff --git a/metadata/timestamp.chk b/metadata/timestamp.chk
index 0745aedb58edc..839350b095996 100644
--- a/metadata/timestamp.chk
+++ b/metadata/timestamp.chk
@@ -1 +1 @@
-Tue, 11 Jul 2023 16:48:46 +0000
+Tue, 11 Jul 2023 17:18:49 +0000