diff --git a/Dockerfile b/Dockerfile
index ee4179c8..a9824174 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 # STAGE 1: setup an opam switch with all dependencies installed
 #
 # (only depends on the opam files)
-FROM ocamlpro/ocaml:4.14-2023-06-18 AS dev-build-context
+FROM ocamlpro/ocaml:4.14-2023-08-01 AS dev-build-context
 # Image from https://hub.docker.com/r/ocamlpro/ocaml
 
 RUN mkdir catala
@@ -25,19 +25,6 @@ RUN opam --cli=2.1 switch create catala ocaml-system && \
 # Note: just `opam switch create . --deps-only --with-test --with-doc && opam clean`
 # should be enough once opam 2.2 is released (see opam#5185)
 
-# Install extra dependencies not handled yet by the opam depexts
-#
-# python3, ninja (samurai in this case), etc. already got installed through opam's
-# depext mechanism at this point -- see clerk.opam and catala.opam
-#
-# pandoc is not in alpine stable yet though, so install it manually with an explicit repository
-RUN sudo apk add pandoc --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community/
-
-# Workaround broken rescript build that recompiles its own version of
-# ninja with a badly written script :[]
-RUN sudo apk add pythonispython3
-
-
 #
 # STAGE 2: get the whole repo, run checks and builds
 #
diff --git a/catala.opam b/catala.opam
index b19bdc14..188e1047 100644
--- a/catala.opam
+++ b/catala.opam
@@ -71,10 +71,10 @@ build: [
 ]
 dev-repo: "git+https://github.com/CatalaLang/catala.git"
 depexts: [
-  ["groff" "colordiff" "latexmk" "python3-pip" "pandoc"]
+  ["groff" "latexmk" "python3-pip" "pandoc"]
     {cataladevmode & os-family = "debian"}
-  ["groff" "colordiff" "texlive" "texmf-dist-fontsextra" "texmf-dist-latexextra" "py3-pip" "py3-pygments"]
+  ["groff" "texlive-xetex" "texmf-dist-latexextra" "texmf-dist-pictures" "py3-pip" "py3-pygments" "pandoc-cli"]
     {cataladevmode & os-distribution = "alpine"}
-  ["groff" "colordiff" "latex-mk" "python-pygments" "pandoc"]
+  ["groff" "latex-mk" "python-pygments" "pandoc"]
     {cataladevmode & os-family = "arch"}
 ]
diff --git a/clerk.opam b/clerk.opam
index b70e2497..9114a831 100644
--- a/clerk.opam
+++ b/clerk.opam
@@ -38,4 +38,8 @@ dev-repo: "git+https://github.com/CatalaLang/catala.git"
 depexts: [
   ["ninja-build"] {os-family = "debian"}
   ["samurai"] {os-distribution = "alpine"}
+  ["colordiff"] {cataladevmode &
+                 (os-distribution = "alpine" |
+                  os-family = "arch" |
+                  os-family = "debian")}
 ]