diff --git a/.envrc b/.envrc
index 1d953f4..894571b 100644
--- a/.envrc
+++ b/.envrc
@@ -1 +1,3 @@
-use nix
+source_url "https://raw.githubusercontent.com/cachix/devenv/82c0147677e510b247d8b9165c54f73d32dfd899/direnvrc" "sha256-7u4iDd1nZpxL4tCzmPG0dQgC5V+/44Ba+tHkPob1v2k="
+
+use devenv
diff --git a/.gitignore b/.gitignore
index 92b2793..81f0f67 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,10 @@
 .direnv
+# Devenv
+.devenv*
+devenv.local.nix
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml
diff --git a/devenv.lock b/devenv.lock
new file mode 100644
index 0000000..effe809
--- /dev/null
+++ b/devenv.lock
@@ -0,0 +1,116 @@
+{
+  "nodes": {
+    "devenv": {
+      "locked": {
+        "dir": "src/modules",
+        "lastModified": 1730745597,
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "7cfc04e544e67adf803c3634b53a911c670e046e",
+        "type": "github"
+      },
+      "original": {
+        "dir": "src/modules",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "pre-commit-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1716977621,
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "4267e705586473d3e5c8d50299e71503f16a6fb6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1730741070,
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d063c1dd113c91ab27959ba540c0d9753409edf3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "pre-commit-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "nixpkgs-stable": "nixpkgs-stable"
+      },
+      "locked": {
+        "lastModified": 1730814269,
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "rev": "d70155fdc00df4628446352fc58adc640cd705c2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "nixpkgs": "nixpkgs",
+        "pre-commit-hooks": "pre-commit-hooks"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/devenv.nix b/devenv.nix
new file mode 100644
index 0000000..e0c64a3
--- /dev/null
+++ b/devenv.nix
@@ -0,0 +1,34 @@
+{ pkgs, lib, config, inputs, ... }:
+
+{
+  # https://devenv.sh/basics/
+  env.GREET = "devenv";
+
+  # https://devenv.sh/packages/
+  packages = [
+    pkgs.git
+    pkgs.python312Packages.beautifulsoup4
+    pkgs.python312Packages.black
+    pkgs.python312Packages.bpython
+    pkgs.python312Packages.docopt
+    pkgs.python312Packages.isort
+    pkgs.python312Packages.pandas
+    pkgs.python312Packages.pytest
+    pkgs.python312Packages.qbittorrent-api
+    pkgs.python312Packages.requests
+    pkgs.python312Packages.resend
+    pkgs.python312Packages.rich
+    pkgs.python312Packages.tabulate
+    pkgs.pyright
+    pkgs.shellcheck
+  ];
+
+  # https://devenv.sh/languages/
+  # languages.rust.enable = true;
+  languages.python.enable = true;
+
+  enterShell = ''
+    hello
+    git --version
+  '';
+}
diff --git a/devenv.yaml b/devenv.yaml
new file mode 100644
index 0000000..116a2ad
--- /dev/null
+++ b/devenv.yaml
@@ -0,0 +1,15 @@
+# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
+inputs:
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling
+
+# If you're using non-OSS software, you can set allowUnfree to true.
+# allowUnfree: true
+
+# If you're willing to use a package that's vulnerable
+# permittedInsecurePackages:
+#  - "openssl-1.1.1w"
+
+# If you have more than one devenv you can merge them
+#imports:
+# - ./backend
diff --git a/qbth.py b/qbth.py
index 59025cb..e5ae3db 100755
--- a/qbth.py
+++ b/qbth.py
@@ -17,15 +17,25 @@ Options:
 import json
 import os
 import subprocess
+from shutil import which
 
+import qbittorrentapi
 import requests
 from bs4 import BeautifulSoup
 from docopt import docopt
-from qbittorrent import Client
 
 args = docopt(__doc__)
-qb = Client(args["HOSTNAME"])
-qb.login(username=args["USERNAME"], password=args["PASSWORD"])
+conn_info = dict(
+    host=args["HOSTNAME"],
+    username=args["USERNAME"],
+    password=args["PASSWORD"],
+)
+qbt_client = qbittorrentapi.Client(**conn_info)
+
+try:
+    qbt_client.auth_log_in()
+except qbittorrentapi.LoginFailed as e:
+    print(e)
 
 
 def add_torrents(urls: list[str]):
@@ -35,9 +45,16 @@ def add_torrents(urls: list[str]):
     Params:
         urls: list of strings that are URLs.
     """
-    for url in urls:
-        qb.download_from_link(url, category="distro")
-        print(f"Added {os.path.basename(url)}")
+    with qbittorrentapi.Client(**conn_info) as qbt_client:
+        for url in urls:
+            response = requests.get(url)
+            if response.status_code == 200:
+                if qbt_client.torrents_add(url, category="distro") != "Ok.":
+                    raise Exception("Failed to add torrent: " + os.path.basename(url))
+                else:
+                    print(f"Added {os.path.basename(url)}")
+            else:
+                print(f"{response.status_code}: {url}")
 
 
 def add_torrents_from_html(webpage_url: str, torrent_substring: str):
@@ -52,11 +69,21 @@ def add_torrents_from_html(webpage_url: str, torrent_substring: str):
     """
     reqs = requests.get(webpage_url, timeout=60)
     soup = BeautifulSoup(reqs.text, "html.parser")
-    for link in soup.find_all("a"):
-        if torrent_substring in link.get("href"):
-            url = f"{webpage_url}/{link.get('href')}"
-            qb.download_from_link(url, category="distro")
-            print(f"Added {link.get('href')}")
+    with qbittorrentapi.Client(**conn_info) as qbt_client:
+        for link in soup.find_all("a"):
+            if torrent_substring in link.get("href"):
+                url = f"{webpage_url}/{link.get('href')}"
+                response = requests.get(url)
+                if response.status_code == 200:
+                    if qbt_client.torrents_add(url, category="distro") != "Ok.":
+                        raise Exception(
+                            "Failed to add torrent: " + os.path.basename(url)
+                        )
+                    else:
+                        print(f"Added {os.path.basename(url)}")
+
+                else:
+                    print(f"{response.status_code}: {url}")
 
 
 def remove_torrents(distro_substring: str):
@@ -69,10 +96,13 @@ def remove_torrents(distro_substring: str):
         distro_substring: a string that is a substring of the distro
             torrent's file name.
     """
-    for torrent in qb.torrents():
-        if distro_substring in torrent.get("name"):  # type: ignore
-            qb.delete_permanently(torrent.get("hash"))  # type: ignore
-            print(f"Removed {torrent.get('name')}")  # type: ignore
+    with qbittorrentapi.Client(**conn_info) as qbt_client:
+        for torrent in qbt_client.torrents_info():
+            if distro_substring in torrent.name:
+                qbt_client.torrents_delete(
+                    torrent_hashes=torrent.hash, delete_files=True
+                )
+                print(f"Removed {torrent.name}")
 
 
 def add_almalinux(rel_ver: str):
@@ -142,8 +172,7 @@ def add_devuan(rel_ver: str):
         relver: the Devuan release version.
     """
     url = f"https://files.devuan.org/devuan_{rel_ver}.torrent"
-    qb.download_from_link(url, category="distro")
-    print(f"Added {os.path.basename(url)}")
+    add_torrents([url])
 
 
 def remove_devuan(rel_ver: str):
@@ -175,11 +204,13 @@ def remove_fedora(rel_ver: str):
     Params:
         relver: the Fedora release version.
     """
-    torrents = qb.torrents()
-    for torrent in torrents:
-        if torrent.get("name").startswith("Fedora") and torrent.get("name").endswith(rel_ver):  # type: ignore
-            qb.delete_permanently(torrent.get("hash"))  # type: ignore
-            print(f"Removed {torrent.get('name')}")  # type: ignore
+    with qbittorrentapi.Client(**conn_info) as qbt_client:
+        for torrent in qbt_client.torrents_info():
+            if torrent.name.startswith("Fedora") and torrent.name.endswith(rel_ver):
+                qbt_client.torrents_delete(
+                    torrent_hashes=torrent.hash, delete_files=True
+                )
+                print(f"Removed {torrent.name}")
 
 
 def add_freebsd(rel_ver: str):
@@ -194,10 +225,13 @@ def add_freebsd(rel_ver: str):
     reqs = requests.get(url, timeout=60)
     data = reqs.text.split("\n")
 
-    for line in data:
-        if line.startswith("magnet:"):
-            qb.download_from_link(line, category="distro")
-            print(f"Added {line.split('=')[2]}")
+    with qbittorrentapi.Client(**conn_info) as qbt_client:
+        for line in data:
+            if line.startswith("magnet:"):
+                if qbt_client.torrents_add(line) != "Ok.":
+                    raise Exception("Failed to add torrent: " + line.split("=")[2])
+
+                print(f"Added {line.split('=')[2]}")
 
 
 def remove_freebsd(rel_ver: str):
@@ -266,9 +300,25 @@ def add_nixos():
     url = "https://api.github.com/repos/AnimMouse/NixOS-ISO-Torrents/releases/latest"
     reqs = requests.get(url, timeout=60)
     json_data = json.loads(reqs.text)
-    for item in json_data["assets"]:
-        qb.download_from_link(item["browser_download_url"], category="distro")
-        print(f"Added {os.path.basename(item['browser_download_url'])}")
+
+    with qbittorrentapi.Client(**conn_info) as qbt_client:
+        for item in json_data["assets"]:
+            response = requests.get(item["browser_download_url"])
+            if response.status_code == 200:
+                if (
+                    qbt_client.torrents_add(
+                        item["browser_download_url"], category="distro"
+                    )
+                    != "Ok."
+                ):
+                    raise Exception(
+                        "Failed to add torrent: "
+                        + os.path.basename(item["browser_download_url"])
+                    )
+                else:
+                    print(f"Added {os.path.basename(item['browser_download_url'])}")
+            else:
+                print(f"{response.status_code}: {item['browser_download_url']}")
 
 
 def remove_nixos():
@@ -289,8 +339,16 @@ def add_qubes(rel_ver: str):
         relver: the QubesOS release version.
     """
     url = f"https://mirrors.edge.kernel.org/qubes/iso/Qubes-R{rel_ver}-x86_64.torrent"
-    qb.download_from_link(url, category="distro")
-    print(f"Added {os.path.basename(url)}")
+
+    response = requests.get(url)
+    if response.status_code == 200:
+        with qbittorrentapi.Client(**conn_info) as qbt_client:
+            if qbt_client.torrents_add(url, category="distro") != "Ok.":
+                raise Exception("Failed to add torrent: " + os.path.basename(url))
+            else:
+                print(f"Added {os.path.basename(url)}")
+    else:
+        print(f"{response.status_code}: {url}")
 
 
 def remove_qubes(rel_ver: str):
@@ -356,6 +414,10 @@ def remove_tails(rel_ver: str):
 
 
 if __name__ == "__main__":
+    # Check if gum is installed.
+    if which("gum") is None:
+        exit("Please install gum first. https://github.com/charmbracelet/gum")
+
     # Run the gum program in a subprocess to allow easy selecting of distro
     # torrents.
     distro_selection = subprocess.run(
diff --git a/shell.nix b/shell.nix
deleted file mode 100644
index 12eed60..0000000
--- a/shell.nix
+++ /dev/null
@@ -1,44 +0,0 @@
-with import <nixpkgs> { };
-
-let
-  python-qbittorrent = pkgs.python312Packages.buildPythonPackage rec {
-    name = "python-qbittorrent-${version}";
-    version = "0.4.3";
-
-    src = pkgs.fetchurl {
-      url = "https://files.pythonhosted.org/packages/86/25/a5ad35ad229c8016a8c98327495e649cb795be2fda63f8cace6c9a739af7/python-qbittorrent-${version}.tar.gz";
-      sha256 = "4e22cf89890628b054a60aa4bd1161a68c2b0fad48ef0886fa4d325e69d3828a";
-    };
-
-    meta = {
-      homepage = "https://github.com/v1k45/python-qBittorrent";
-      description = "Python wrapper for qBittorrent Web API (for versions above v3.1.x)";
-      license = lib.licenses.mit;
-      maintainers = with maintainers; [ v1k45 ];
-    };
-
-    nativeBuildInputs = with pkgs.python312Packages; [
-      pip
-      requests
-    ];
-  };
-
-in
-mkShell {
-  buildInputs = with pkgs; [
-    python312Packages.beautifulsoup4
-    python312Packages.black
-    python312Packages.bpython
-    python312Packages.docopt
-    python312Packages.isort
-    python312Packages.pandas
-    python312Packages.pytest
-    python312Packages.requests
-    python312Packages.resend
-    python312Packages.rich
-    python312Packages.tabulate
-    pyright
-    python-qbittorrent
-    shellcheck
-  ];
-}