diff --git a/caladan/acme_refresh/justfile b/caladan/acme_refresh/justfile
new file mode 100755
index 0000000..457936e
--- /dev/null
+++ b/caladan/acme_refresh/justfile
@@ -0,0 +1,7 @@
+dag := justfile_directory()
+
+run:
+    make --directory "{{dag}}"
+
+render:
+    make --file ../../common/render-dag.make
diff --git a/flake.nix b/flake.nix
index 4b56a91..9abfc6a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,7 +8,8 @@
       let pkgs = nixpkgs.legacyPackages.${system};
       in {
         devShells.default = pkgs.mkShell {
-          packages = [ pkgs.gnumake pkgs.makefile2graph pkgs.graphviz ];
+          packages =
+            [ pkgs.gnumake pkgs.makefile2graph pkgs.graphviz pkgs.just ];
         };
       });
 }
diff --git a/fugu/acme_refresh/justfile b/fugu/acme_refresh/justfile
new file mode 100755
index 0000000..f6e6173
--- /dev/null
+++ b/fugu/acme_refresh/justfile
@@ -0,0 +1,7 @@
+dag := justfile_directory()
+
+run:
+    gmake --directory "{{dag}}"
+
+render:
+    make --file ../../common/render-dag.make
diff --git a/narwhal/acme_renew/justfile b/narwhal/acme_renew/justfile
new file mode 100755
index 0000000..457936e
--- /dev/null
+++ b/narwhal/acme_renew/justfile
@@ -0,0 +1,7 @@
+dag := justfile_directory()
+
+run:
+    make --directory "{{dag}}"
+
+render:
+    make --file ../../common/render-dag.make
diff --git a/narwhal/ddns/justfile b/narwhal/ddns/justfile
new file mode 100755
index 0000000..457936e
--- /dev/null
+++ b/narwhal/ddns/justfile
@@ -0,0 +1,7 @@
+dag := justfile_directory()
+
+run:
+    make --directory "{{dag}}"
+
+render:
+    make --file ../../common/render-dag.make
diff --git a/narwhal/mirrors/justfile b/narwhal/mirrors/justfile
new file mode 100755
index 0000000..457936e
--- /dev/null
+++ b/narwhal/mirrors/justfile
@@ -0,0 +1,7 @@
+dag := justfile_directory()
+
+run:
+    make --directory "{{dag}}"
+
+render:
+    make --file ../../common/render-dag.make
diff --git a/pikvm/acme_refresh/justfile b/pikvm/acme_refresh/justfile
new file mode 100755
index 0000000..ba60f46
--- /dev/null
+++ b/pikvm/acme_refresh/justfile
@@ -0,0 +1,7 @@
+dag := justfile_directory()
+
+run:
+    kvmd-pstrun -- make --directory "{{dag}}"
+
+render:
+    make --file ../../common/render-dag.make