diff --git a/pkgs/by-name/ju/justbuild/package.nix b/pkgs/by-name/ju/justbuild/package.nix
index e62ef9140ef4..23166ba8c212 100644
--- a/pkgs/by-name/ju/justbuild/package.nix
+++ b/pkgs/by-name/ju/justbuild/package.nix
@@ -160,6 +160,7 @@ stdenv.mkDerivation rec {
     install -m 755 -Dt "$out/bin" "../build/out/bin/just-mr"
     install -m 755 -DT "bin/just-import-git.py" "$out/bin/just-import-git"
     install -m 755 -DT "bin/just-deduplicate-repos.py" "$out/bin/just-deduplicate-repos"
+    install -m 755 -DT "bin/just-lock.py" "$out/bin/just-lock"
 
     mkdir -p "$out/share/bash-completion/completions"
     install -m 0644 ./share/just_complete.bash "$out/share/bash-completion/completions/just"