diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 702af62..73c640b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,14 +21,28 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [windows-latest]
 
     steps:
     - uses: actions/checkout@v2
+    - run: |
+        npm install
+        npm run all
     - uses: ./
+    - name: Run conda list
+      run: conda list
+    - name: init pwsh
+      run: conda init --system powershell
     - name: Install Python
-      run: mamba install -y -c conda-forge python
+      shell: powershell
+      # run: echo "%PATH%" && CALL activate.bat base && conda info && echo "%PATH%"
+      run: |
+        conda activate base
+        conda env list
+        echo "$env:path"
+    - name: Install stuff
+      run: conda activate base && mamba.bat install -y -c conda-forge xtensor
     - name: Install Notebook and widgets
-      run: mamba install -y -c notebook ipywidgets
+      run: mamba.bat install -y -c conda-forge notebook ipywidgets
     - name: List the packages
-      run: mamba list
+      run: mamba.bat list
diff --git a/dist/index.js b/dist/index.js
index b0510f2..329520b 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1021,6 +1021,15 @@ function installMamba() {
         yield exec.exec('conda', ['install', '-y', '-c', 'conda-forge', 'mamba']);
     });
 }
+function activate(os) {
+    return __awaiter(this, void 0, void 0, function* () {
+        if (os === 'win32') {
+            const basePath = process.env.CONDA;
+            const activateFile = path.join(basePath, 'condabin', 'activate.bat');
+            yield exec.exec('conda', ['shell.powershell', activateFile, 'base']);
+        }
+    });
+}
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
@@ -1029,6 +1038,8 @@ function run() {
             fixPermissions(os);
             core.debug('Add conda to the path');
             yield addPath(os);
+            core.debug('Activate the environment');
+            activate(os);
             core.debug('Installing mamba');
             yield installMamba();
         }
diff --git a/src/main.ts b/src/main.ts
index 75dbd11..44486e6 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -22,8 +22,13 @@ async function addPath(os: string): Promise<void> {
     const bin = path.join(basePath, 'condabin')
     core.addPath(bin)
   } else if (os === 'win32') {
-    const bin = path.join(basePath, 'Scripts')
-    core.addPath(bin)
+    core.addPath(path.join(basePath, 'Library', 'bin'))
+    core.addPath(path.join(basePath, 'condabin'))
+    core.addPath(path.join(basePath, 'bin'))
+    core.addPath(path.join(basePath, 'Scripts'))
+    core.addPath(path.join(basePath, 'Library', 'usr', 'bin'))
+    core.addPath(path.join(basePath, 'Library', 'mingw-w64', 'bin'))
+    core.addPath(path.join(basePath))
   } else {
     const bin = path.join(basePath, 'bin')
     core.addPath(bin)
@@ -34,6 +39,14 @@ async function installMamba(): Promise<void> {
   await exec.exec('conda', ['install', '-y', '-c', 'conda-forge', 'mamba'])
 }
 
+async function activate(os: string): Promise<void> {
+  if (os === 'win32') {
+    const basePath = process.env.CONDA as string
+    const activateFile = path.join(basePath, 'condabin', 'activate.bat')
+    await exec.exec('conda', ['shell.powershell', activateFile, 'base'])
+  }
+}
+
 async function run(): Promise<void> {
   try {
     const os = process.platform
@@ -44,6 +57,9 @@ async function run(): Promise<void> {
     core.debug('Add conda to the path')
     await addPath(os)
 
+    core.debug('Activate the environment')
+    activate(os)
+
     core.debug('Installing mamba')
     await installMamba()
   } catch (error) {