diff --git a/build_system/clerk_driver.ml b/build_system/clerk_driver.ml
index 90a1432f..f8469d47 100644
--- a/build_system/clerk_driver.ml
+++ b/build_system/clerk_driver.ml
@@ -338,7 +338,7 @@ let pipe_diff_cmd =
         Var.tested_file;
         Lit "/dev/stdin";
       ]
-  else Seq [Lit "| colordiff -u -b"; Var.tested_file; Lit "-"]
+  else Seq [Lit "| diff -u -b --color"; Var.tested_file; Lit "-"]
 
 let inline_test_rule catala_exe catala_opts =
   let open Nj.Expr in
diff --git a/clerk.opam b/clerk.opam
index 9114a831..58babf36 100644
--- a/clerk.opam
+++ b/clerk.opam
@@ -19,6 +19,7 @@ depends: [
   "catala" {= version}
   "ninja_utils" {= version}
   "odoc" {with-doc}
+  "conf-diffutils" {cataladevmode}
 ]
 build: [
   ["dune" "subst"] {dev}
@@ -38,8 +39,4 @@ 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")}
 ]