diff --git a/.gitignore b/.gitignore
index 841e961..c81f728 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 __pycache__/
-venv/
 .tox/
 .hypothesis/
 .mutmut-cache
diff --git a/Jenkinsfile b/Jenkinsfile
index 274efe1..8a36853 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -12,10 +12,9 @@
                         }
                     }
                     steps {
-                        echo "Building for Linux"
-                        sh ". ./env.sh; dobuild"
-                        echo "Testing for Linux"
-                        sh ". ./env.sh; domut_ci && dotest_ci"
+                        echo "Running CI for Linux"
+                        sh "pip install tox"
+                        sh "tox -q r -e ci"
                         sh "mv dist dist.linux"
                         archiveArtifacts artifacts: 'dist.linux', fingerprint: true
                         cleanWs cleanWhenAborted: false, cleanWhenFailure: false, cleanWhenNotBuilt: false, cleanWhenUnstable: false
@@ -26,11 +25,9 @@
                         label 'windows'
                     }
                     steps {
-                        echo "Building for Windows"
-                        sh ". .\\env.ps1; dobuild"
-                        echo "Testing for Windows"
-                        pwsh ".\\env.ps1; domut_ci; dotest_ci"
-                        pwsh "mv dist dist.windows"
+                        echo "Running CI for Windows"
+                        sh "tox -q r -e ci"
+                        sh "mv dist dist.windows"
                         archiveArtifacts artifacts: 'dist.windows', fingerprint: true
                         cleanWs cleanWhenAborted: false, cleanWhenFailure: false, cleanWhenNotBuilt: false, cleanWhenUnstable: false
                     }
diff --git a/env.ps1 b/env.ps1
deleted file mode 100644
index 2434519..0000000
--- a/env.ps1
+++ /dev/null
@@ -1,50 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-only
-# Copyright 2022 Jookia <contact@jookia.org>
-
-# Set up UTF-8 support for PowerShell pipes
-[System.Console]::OutputEncoding = [System.Text.Encoding]::UTF8;
-[System.Console]::InputEncoding = [System.Text.Encoding]::UTF8;
-$env:PYTHONIOENCODING = "utf-8";
-
-Function Activate { .\venv\Scripts\Activate.ps1 }
-
-Function Die {
-    Param ( $Message )
-    Remove-Item -Recurse venv
-    Write-Output $Message
-    Exit 1
-}
-
-Function Setup {
-    Write-Output "No venv found, creating..."
-    python -m venv venv || Die "Unable to create venv"
-    Write-Output "Activating venv..."
-    Activate
-    Write-Output "Updating pip..."
-    python -m pip -q install -U pip || Die "Unable to update pip"
-    Write-Output "Installing requirements..."
-    python -m pip -q install --use-pep517 -r requirements.txt || Die "Unable to install requirements"
-    New-Item venv\.stamp | Out-Null
-    Write-Output "All done!"
-}
-
-If (Test-Path -Path venv\.stamp) { Activate } Else { Setup }
-
-$env:PYTHONPATH += ";$PWD\src";
-
-# NOTE: PowerShell functions always return success even if the commands inside
-# failed. This makes it infeasible to do proper error checking.
-# See https://github.com/PowerShell/PowerShell/issues/12218
-
-Function Global:resetenv { rm -r venv; .\env.ps1 }
-Function Global:dotidy { black src tests }
-Function Global:dolint { flake8 src tests }
-Function Global:dotest { pytest -q -n auto -x -l --sw --hypothesis-profile=dev $args }
-Function Global:dotest_dev { pytest -vv -n 0 -x -l --sw --hypothesis-profile=dev $args }
-Function Global:dotest_ci { pytest -q -n auto --hypothesis-profile=ci }
-Function Global:dotest_long { pytest -q -n auto --hypothesis-profile=long }
-Function Global:docheck { dotidy; dolint; dotest }
-Function Global:_envps1_domut { mutmut run --paths-to-mutate "src/newlang/parse2,src/newlang/i18n.py" $args }
-Function Global:domut { _envps1_domut }
-Function Global:domut_ci { _envps1_domut --no-progress || mutmut results }
-Function Global:dobuild { python -m build }
diff --git a/env.sh b/env.sh
deleted file mode 100644
index e25f574..0000000
--- a/env.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-only
-# Copyright 2022 Jookia <contact@jookia.org>
-
-activate() { . venv/bin/activate; }
-
-die() {
-  rm -r venv
-  echo "$1"
-}
-
-setup() {
-  echo "No venv found, creating..."
-  if ! python3 -m venv venv ; then die "Unable to create venv"; return; fi
-  echo "Activating venv..."
-  activate
-  echo "Updating pip..."
-  if ! pip -q install -U pip ; then die "Unable to update pip"; return; fi
-  echo "Installing requirements..."
-  if ! pip -q install --use-pep517 -r requirements.txt ; then die "Unable to install requirements"; return; fi
-  touch venv/.stamp
-  echo "All done!"
-}
- 
-if test -e venv/.stamp; then activate; else setup; fi
-
-export PYTHONPATH="$PYTHONPATH:$PWD/src"
-
-unset -f activate die setup
-
-resetenv() { rm -r venv; . ./env.sh; }
-dotidy() { black src tests; }
-dolint() { flake8 src tests; }
-dotest() { pytest -q -n auto -x -l --sw --hypothesis-profile=dev $@; }
-dotest_dev() { pytest -vv -n 0 -x -l --sw --hypothesis-profile=dev $@; }
-dotest_ci() { pytest -q -n auto --hypothesis-profile=ci; }
-dotest_long() { pytest -q -n auto --hypothesis-profile=long; }
-docheck() { dotidy && dolint && dotest; }
-_envsh_domut() { mutmut run --paths-to-mutate "src/newlang/parse2,src/newlang/i18n.py" $@; }
-domut() { _envsh_domut; }
-domut_ci() { _envsh_domut --no-progress || (mutmut results; exit 1); }
-dobuild() { python -m build; }