diff --git a/taskcluster/kinds/toolchain/qt.yml b/taskcluster/kinds/toolchain/qt.yml
index 0047e569fe..fdc7669aab 100644
--- a/taskcluster/kinds/toolchain/qt.yml
+++ b/taskcluster/kinds/toolchain/qt.yml
@@ -45,6 +45,8 @@ qt-windows-x86_64-6.6:
 qt-windows-aarch64-6.6:
     description: "Windows QT compile Task"
     fetches:
+        fetch:
+            - win-conda
         toolchain:
             - bundle-msvc
             - conda-windows-base-x86_64
diff --git a/taskcluster/scripts/toolchain/compile_qt_fancy.ps1 b/taskcluster/scripts/toolchain/compile_qt_fancy.ps1
index 47a95f0bd2..b442dab4ff 100644
--- a/taskcluster/scripts/toolchain/compile_qt_fancy.ps1
+++ b/taskcluster/scripts/toolchain/compile_qt_fancy.ps1
@@ -4,9 +4,10 @@
 
 . "$PSScriptRoot/../common/helpers.ps1"
 
+$ErrorActionPreference = "Stop"
 # Unpack Conda-Base
 Install-MiniConda
-$CONDA_DIR = resolve-path "$FETCHES_PATH\conda-win-base"
+$CONDA_DIR = resolve-path "$FETCHES_PATH\win-base"
 Start-Process -NoNewWindow "$CONDA_DIR\Scripts\conda-unpack.exe" -Wait
 conda activate $CONDA_DIR
 conda info