diff --git a/Justfile b/Justfile
new file mode 100644
index 0000000..5755128
--- /dev/null
+++ b/Justfile
@@ -0,0 +1,4 @@
+rverurl := 'https://raw.githubusercontent.com/ropensci/rix/refs/heads/main/inst/extdata/available_df.csv'
+update-r-version:
+    RVER=$( wget -qO- {{rverurl}} | tail -n 2 | head -n 1 | cut -d',' -f4 | tr -d '"' ) &&\
+     sed -i  "s|rixpkgs.url = \"https://github.com/rstats-on-nix/nixpkgs/archive/[0-9]\{4\}-[0-9]\{2\}-[0-9]\{2\}\.tar\.gz\";|rixpkgs.url = \"https://github.com/rstats-on-nix/nixpkgs/archive/$RVER.tar.gz\";|" flake.nix
diff --git a/flake.nix b/flake.nix
index ad92ce8..69e0d5f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -42,6 +42,8 @@
                   (rWrapper.override {
                     packages = rpkgs;
                   })
+                  just
+                  wget
                 ];
               }
             );
diff --git a/test.R b/test.R
deleted file mode 100644
index 4728467..0000000
--- a/test.R
+++ /dev/null
@@ -1,10 +0,0 @@
-ls()
-library()
-library(igraph)
-library(R.utils)
-library(stats)
-library(data.table)
-library(fixest)
-library(ggplot2)
-library(dplyr)
-.packages(TRUE) |> sort()