diff --git a/env.ps1 b/env.ps1
index 99a988b..57b4f65 100644
--- a/env.ps1
+++ b/env.ps1
@@ -23,7 +23,7 @@
     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 -r requirements.txt || Die "Unable to install 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!"
 }
diff --git a/env.sh b/env.sh
index d692a42..ecda878 100644
--- a/env.sh
+++ b/env.sh
@@ -16,7 +16,7 @@
   echo "Updating pip..."
   if ! pip -q install -U pip ; then die "Unable to update pip"; return; fi
   echo "Installing requirements..."
-  if ! pip -q install -r requirements.txt ; then die "Unable to install requirements"; return; fi
+  if ! pip -q install --use-pep517 -r requirements.txt ; then die "Unable to install requirements"; return; fi
   touch venv/.stamp
   echo "All done!"
 }