diff --git a/templates/indica.nix b/templates/indica.nix
deleted file mode 100644
index 9e28641d..00000000
--- a/templates/indica.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-
-pkgs.stdenv.mkDerivation {
-  pname = "indica-notebook";
-  version = "1.0.0";
-
-  buildInputs = with pkgs; [
-    (python39.withPackages (ps: with ps; [
-      jupyter
-    ]))
-  ];
-
-  configurePhase = '''';
-
-  buildPhase = '''';
-
-  installPhase = '''';
-}
diff --git a/templates/jupyter.nix b/templates/jupyter.nix
deleted file mode 100644
index 9c7ebe16..00000000
--- a/templates/jupyter.nix
+++ /dev/null
@@ -1,30 +0,0 @@
-{ tinypkgs ? import
-    (fetchTarball {
-      url = "https://gitlab.inria.fr/nix-tutorial/packages-repository/-/archive/master/packages-repository-8e43243635cd8f28c7213205b08c12f2ca2ac74d.tar.gz";
-      sha256 = "sha256:09l2w3m1z0308zc476ci0bsz5amm536hj1n9xzpwcjm59jxkqpqa";
-    })
-    { }
-}:
-
-with tinypkgs; # Put tinypkgs's attributes in the current scope.
-with pkgs; # Same for pkgs.
-
-mkShell {
-  buildInputs = [
-    chord
-
-    # Defines a python + set of packages.
-    (python3.withPackages (ps: with ps; with python3Packages; [
-      jupyter
-      ipython
-
-      # Uncomment the following lines to make them available in the shell.
-      # pandas
-      # numpy
-      # matplotlib
-    ]))
-  ];
-
-  # Automatically run jupyter when entering the shell.
-  shellHook = "jupyter notebook";
-}
diff --git a/templates/poetry.nix b/templates/poetry.nix
new file mode 100644
index 00000000..b9724b32
--- /dev/null
+++ b/templates/poetry.nix
@@ -0,0 +1,24 @@
+{ pkgs ? import <nixpkgs> {}, python ? pkgs.python39, ... }:
+
+let
+  python-packages = ps: with ps; [
+    pip
+    setuptools
+    wheel
+  ];
+in
+pkgs.mkShell {
+  nativeBuildInputs = with pkgs; [
+    (python.withPackages python-packages)
+    poetry
+    git
+    zlib
+    libgccjit
+  ];
+
+  shellHook = ''
+    export LD_LIBRARY_PATH="${pkgs.zlib}/lib:${pkgs.libgccjit}/lib"
+    [ ! -d "./.venv" ] && poetry install --sync
+    source .venv/bin/activate
+  '';
+}
diff --git a/templates/python.nix b/templates/python.nix
index bfb4071f..b9193c90 100644
--- a/templates/python.nix
+++ b/templates/python.nix
@@ -1,4 +1,4 @@
-{ pkgs ? import <nixpkgs> { } }:
+{ pkgs ? import <nixpkgs> {}, python ? pkgs.python39, ... }:
 
 let
   python-packages = ps: with ps; [
@@ -7,18 +7,17 @@ let
     wheel
   ];
 in
-with pkgs;
-(buildFHSUserEnv {
-  name = "python";
-  targetPkgs = pkgs: [ ];
-  multiPkgs = pkgs: [
-    zlib zlib-ng
-    (python39.withPackages python-packages)
+pkgs.mkShell {
+  nativeBuildInputs = with pkgs; [
+    (python.withPackages python-packages)
+    git
+    zlib
+    libgccjit
   ];
-  runScript = ''
-    bash -c "{
-      python -m venv .venv
-      source .venv/bin/activate
-    }"
+
+  shellHook = ''
+    export LD_LIBRARY_PATH="${pkgs.zlib}/lib:${pkgs.libgccjit}/lib"
+    python -m venv .venv
+    source .venv/bin/activate
   '';
-}).env
+}