diff --git a/docs/dev/setup.md b/docs/dev/setup.md
index d7a6f3be26296185a5e84f5ef8153053729f31dc..ef3140d9913d44df020a70540604f676c445bd35 100644
--- a/docs/dev/setup.md
+++ b/docs/dev/setup.md
@@ -79,3 +79,16 @@ rustup update nightly
 rustup update stable
 rustup target add wasm32-unknown-unknown --toolchain nightly
 ```
+
+
+### Installing mold linker to decrease build time
+
+Mold (modern linker) (https://github.com/rui314/mold) decreases the build time. Install it through your system package for example then add the following to your `~/.cargo/config`:
+
+```toml
+[target.x86_64-unknown-linux-gnu]
+linker = "clang"
+rustflags = ["-C", "link-arg=-fuse-ld=/usr/bin/mold"]
+```
+
+(see https://forum.duniter.org/t/decrease-duniter-build-time/10170 on the forum)
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