From 9286bb41d3d93666cd88885d3c84ff1ebf6417f4 Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Wed, 12 Nov 2025 12:47:35 -0500
Subject: [PATCH 01/13] Dummy commit

---
 tests/test_examples.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/test_examples.py b/tests/test_examples.py
index 7d8913e2..7108b95f 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -166,6 +166,8 @@ def _run_installer_exe(
         _check_installer_log(install_dir)
     return process
 
+def _run_uninstaller_windows():
+    print("TODO")
 
 def _run_uninstaller_exe(
     install_dir: Path,

From 92735f06ee7618bf9115ddb9eaf6e0dc949ff0e8 Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Wed, 12 Nov 2025 13:54:35 -0500
Subject: [PATCH 02/13] Temporarily disable verbosity

---
 tests/test_examples.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tests/test_examples.py b/tests/test_examples.py
index 7108b95f..cf21ec04 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -361,13 +361,16 @@ def create_installer(
     cmd = [
         *COV_CMD,
         "constructor",
-        "-v",
         str(input_dir),
         "--output-dir",
         str(output_dir),
         "--config-filename",
         config_filename,
     ]
+    # This flag will (if enabled) create a lot of output upon test failures for .exe-installers.
+    # If debugging generated NSIS templates, it can be worth to enable.
+    if os.getenv("CONSTRUCTOR_VERBOSE"):
+        cmd.insert(2, "-v")
     if conda_exe:
         cmd.extend(["--conda-exe", conda_exe])
     if debug:

From efe3ef30076441f46c73a2776d23144e3ce803b2 Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Wed, 12 Nov 2025 14:13:10 -0500
Subject: [PATCH 03/13] Set appropriate version, raise error on missing
 executable

---
 constructor/briefcase.py            | 5 +++++
 examples/extra_files/construct.yaml | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/constructor/briefcase.py b/constructor/briefcase.py
index eea2083d..cb0fa0b1 100644
--- a/constructor/briefcase.py
+++ b/constructor/briefcase.py
@@ -133,6 +133,11 @@ def create(info, verbose=False):
     copy_conda_exe(external_dir, "_conda.exe", info["_conda_exe"])
 
     briefcase = Path(sysconfig.get_path("scripts")) / "briefcase.exe"
+    if not briefcase.exists():
+        raise FileNotFoundError(
+            f"Dependency 'briefcase' does not seem installed."
+            f"Tried: {briefcase}"
+        )
     logger.info("Building installer")
     run(
         [briefcase, "package"] + (["-v"] if verbose else []),
diff --git a/examples/extra_files/construct.yaml b/examples/extra_files/construct.yaml
index 0bcbd2b6..de294d5c 100644
--- a/examples/extra_files/construct.yaml
+++ b/examples/extra_files/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: ExtraFiles
-version: X
+version: 1.0.0
 installer_type: all
 check_path_spaces: False
 check_path_length: False

From 0d0063b5f560bda3eb95da62eb3d8acadc1390ea Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Wed, 12 Nov 2025 15:35:48 -0500
Subject: [PATCH 04/13] Update github workflow and briefcase test integration

---
 .github/workflows/main.yml | 12 ++++++++++++
 constructor/briefcase.py   | 11 +++++++++--
 tests/test_examples.py     | 12 ++++++++++--
 3 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e053e5c4..5287a935 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -135,6 +135,18 @@ jobs:
         run: conda list
       - name: conda config
         run: conda config --show-sources
+
+      - name: Checkout Briefcase (pinned)
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          repository: beeware/briefcase
+          ref: efb0e08c2a9ce72dcebd0a62c12f5662fd5eb0e0 # this is a commit with latest necessary changes on the main branch
+          path: briefcase
+          fetch-depth: 1
+
+      - name: Install Briefcase (editable)
+        run: |
+          pip install -e briefcase
       - name: Run unit tests
         run: |
           pytest -vv --cov=constructor --cov-branch tests/ -m "not examples"
diff --git a/constructor/briefcase.py b/constructor/briefcase.py
index cb0fa0b1..179c5b01 100644
--- a/constructor/briefcase.py
+++ b/constructor/briefcase.py
@@ -86,6 +86,13 @@ def get_bundle_app_name(info, name):
 
     return bundle, app_name
 
+def get_license(info):
+    """ Retrieve the specified license as a dict or return a placeholder if not set. """
+
+    if "license_file" in info:
+        return {"file": info["license_file"]}
+    # We cannot return an empty string because that results in an exception on the briefcase side.
+    return {"text": "TODO"}
 
 # Create a Briefcase configuration file. Using a full TOML writer rather than a Jinja
 # template allows us to avoid escaping strings everywhere.
@@ -97,7 +104,7 @@ def write_pyproject_toml(tmp_dir, info):
         "project_name": name,
         "bundle": bundle,
         "version": version,
-        "license": ({"file": info["license_file"]} if "license_file" in info else {"text": ""}),
+        "license": get_license(),
         "app": {
             app_name: {
                 "formal_name": f"{info['name']} {info['version']}",
@@ -135,7 +142,7 @@ def create(info, verbose=False):
     briefcase = Path(sysconfig.get_path("scripts")) / "briefcase.exe"
     if not briefcase.exists():
         raise FileNotFoundError(
-            f"Dependency 'briefcase' does not seem installed."
+            f"Dependency 'briefcase' does not seem to be installed.\n"
             f"Tried: {briefcase}"
         )
     logger.info("Building installer")
diff --git a/tests/test_examples.py b/tests/test_examples.py
index cf21ec04..b1bbf4fe 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -44,6 +44,7 @@
 REPO_DIR = Path(__file__).parent.parent
 ON_CI = bool(os.environ.get("CI")) and os.environ.get("CI") != "0"
 CONSTRUCTOR_CONDA_EXE = os.environ.get("CONSTRUCTOR_CONDA_EXE")
+CONSTRUCTOR_VERBOSE = os.getenv.get("CONSTRUCTOR_VERBOSE")
 CONDA_EXE, CONDA_EXE_VERSION = identify_conda_exe(CONSTRUCTOR_CONDA_EXE)
 if CONDA_EXE_VERSION is not None:
     CONDA_EXE_VERSION = Version(CONDA_EXE_VERSION)
@@ -369,7 +370,7 @@ def create_installer(
     ]
     # This flag will (if enabled) create a lot of output upon test failures for .exe-installers.
     # If debugging generated NSIS templates, it can be worth to enable.
-    if os.getenv("CONSTRUCTOR_VERBOSE"):
+    if CONSTRUCTOR_VERBOSE:
         cmd.insert(2, "-v")
     if conda_exe:
         cmd.extend(["--conda-exe", conda_exe])
@@ -489,7 +490,14 @@ def test_example_extra_envs(tmp_path, request):
 def test_example_extra_files(tmp_path, request):
     input_path = _example_path("extra_files")
     for installer, install_dir in create_installer(input_path, tmp_path, with_spaces=True):
-        _run_installer(input_path, installer, install_dir, request=request)
+        _run_installer(
+            input_path,
+            installer,
+            install_dir,
+            request=request,
+            check_sentinels=CONSTRUCTOR_VERBOSE,
+            check_subprocess=CONSTRUCTOR_VERBOSE
+        )
 
 
 def test_example_mirrored_channels(tmp_path, request):

From a32f560358778eb7c5d41aa88aa14ca6ed179b9c Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Wed, 12 Nov 2025 15:37:04 -0500
Subject: [PATCH 05/13] Fixed typo in os-function

---
 tests/test_examples.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/test_examples.py b/tests/test_examples.py
index b1bbf4fe..4e0f84b0 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -44,7 +44,7 @@
 REPO_DIR = Path(__file__).parent.parent
 ON_CI = bool(os.environ.get("CI")) and os.environ.get("CI") != "0"
 CONSTRUCTOR_CONDA_EXE = os.environ.get("CONSTRUCTOR_CONDA_EXE")
-CONSTRUCTOR_VERBOSE = os.getenv.get("CONSTRUCTOR_VERBOSE")
+CONSTRUCTOR_VERBOSE = os.environ.get("CONSTRUCTOR_VERBOSE")
 CONDA_EXE, CONDA_EXE_VERSION = identify_conda_exe(CONSTRUCTOR_CONDA_EXE)
 if CONDA_EXE_VERSION is not None:
     CONDA_EXE_VERSION = Version(CONDA_EXE_VERSION)

From 6a23b557a9d621d93143d739b9ea4d13b7c6ffb0 Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Wed, 12 Nov 2025 15:38:35 -0500
Subject: [PATCH 06/13] Add missing argument

---
 constructor/briefcase.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/constructor/briefcase.py b/constructor/briefcase.py
index 179c5b01..af569068 100644
--- a/constructor/briefcase.py
+++ b/constructor/briefcase.py
@@ -104,7 +104,7 @@ def write_pyproject_toml(tmp_dir, info):
         "project_name": name,
         "bundle": bundle,
         "version": version,
-        "license": get_license(),
+        "license": get_license(info),
         "app": {
             app_name: {
                 "formal_name": f"{info['name']} {info['version']}",

From 3d11d7fa423702239fd63c0c4610e37308194a7f Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Thu, 13 Nov 2025 13:26:10 -0500
Subject: [PATCH 07/13] Change version field to 1.0.0 instead of X

---
 examples/azure_signtool/construct.yaml                | 2 +-
 examples/custom_nsis_template/construct.yaml          | 2 +-
 examples/customize_controls/construct.yaml            | 2 +-
 examples/customized_welcome_conclusion/construct.yaml | 2 +-
 examples/exe_extra_pages/construct.yaml               | 2 +-
 examples/extra_envs/construct.yaml                    | 2 +-
 examples/from_env_txt/construct.yaml                  | 2 +-
 examples/from_env_yaml/construct.yaml                 | 2 +-
 examples/from_existing_env/construct.yaml             | 2 +-
 examples/from_explicit/construct.yaml                 | 2 +-
 examples/miniconda/construct.yaml                     | 2 +-
 examples/mirrored_channels/construct.yaml             | 2 +-
 examples/noconda/constructor_input.yaml               | 2 +-
 examples/outputs/construct.yaml                       | 2 +-
 examples/protected_base/construct.yaml                | 2 +-
 examples/register_envs/construct.yaml                 | 2 +-
 examples/scripts/construct.yaml                       | 2 +-
 examples/shortcuts/construct.yaml                     | 2 +-
 examples/signing/construct.yaml                       | 2 +-
 tests/test_main.py                                    | 2 +-
 20 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/examples/azure_signtool/construct.yaml b/examples/azure_signtool/construct.yaml
index f40c2efa..e0c4883f 100644
--- a/examples/azure_signtool/construct.yaml
+++ b/examples/azure_signtool/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: Signed_AzureSignTool
-version: X
+version: 1.0.0
 installer_type: exe
 channels:
   - http://repo.anaconda.com/pkgs/main/
diff --git a/examples/custom_nsis_template/construct.yaml b/examples/custom_nsis_template/construct.yaml
index 4b8eab0b..4a59f423 100644
--- a/examples/custom_nsis_template/construct.yaml
+++ b/examples/custom_nsis_template/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: custom
-version: X
+version: 1.0.0
 ignore_duplicate_files: True
 installer_filename: {{ name }}-installer.exe
 installer_type: exe
diff --git a/examples/customize_controls/construct.yaml b/examples/customize_controls/construct.yaml
index 074c6e8d..3203a8ca 100644
--- a/examples/customize_controls/construct.yaml
+++ b/examples/customize_controls/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: NoCondaOptions
-version: X
+version: 1.0.0
 installer_type: all
 
 channels:
diff --git a/examples/customized_welcome_conclusion/construct.yaml b/examples/customized_welcome_conclusion/construct.yaml
index 79f55f94..1cb22b70 100644
--- a/examples/customized_welcome_conclusion/construct.yaml
+++ b/examples/customized_welcome_conclusion/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: CustomizedWelcomeConclusion
-version: X
+version: 1.0.0
 installer_type: all
 channels:
   - http://repo.anaconda.com/pkgs/main/
diff --git a/examples/exe_extra_pages/construct.yaml b/examples/exe_extra_pages/construct.yaml
index 862cb1d9..78569621 100644
--- a/examples/exe_extra_pages/construct.yaml
+++ b/examples/exe_extra_pages/construct.yaml
@@ -7,7 +7,7 @@
 {% set name = "extraPageSingle" %}
 {% endif %}
 name: {{ name }}
-version: X
+version: 1.0.0
 installer_type: all
 channels:
   - http://repo.anaconda.com/pkgs/main/
diff --git a/examples/extra_envs/construct.yaml b/examples/extra_envs/construct.yaml
index aedaf28f..aad79aac 100644
--- a/examples/extra_envs/construct.yaml
+++ b/examples/extra_envs/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: ExtraEnvs
-version: X
+version: 1.0.0
 installer_type: all
 channels:
   - https://conda.anaconda.org/conda-forge
diff --git a/examples/from_env_txt/construct.yaml b/examples/from_env_txt/construct.yaml
index ee8412dc..5cb7ae77 100644
--- a/examples/from_env_txt/construct.yaml
+++ b/examples/from_env_txt/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: EnvironmentTXT
-version: X
+version: 1.0.0
 installer_type: all
 environment_file: env.txt
 initialize_by_default: false
diff --git a/examples/from_env_yaml/construct.yaml b/examples/from_env_yaml/construct.yaml
index d86bdeaf..caa5922b 100644
--- a/examples/from_env_yaml/construct.yaml
+++ b/examples/from_env_yaml/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: EnvironmentYAML
-version: X
+version: 1.0.0
 installer_type: all
 environment_file: env.yaml
 initialize_by_default: false
diff --git a/examples/from_existing_env/construct.yaml b/examples/from_existing_env/construct.yaml
index e60d0094..42a95ed0 100644
--- a/examples/from_existing_env/construct.yaml
+++ b/examples/from_existing_env/construct.yaml
@@ -1,7 +1,7 @@
 # yaml-language-server: $schema=../../constructor/data/construct.schema.json
 "$schema": "../../constructor/data/construct.schema.json"
 name: Existing
-version: X
+version: 1.0.0
 installer_type: all
 environment: {{ os.environ.get("CONSTRUCTOR_TEST_EXISTING_ENV", os.environ["CONDA_PREFIX"]) }}
 channels:
diff --git a/examples/from_explicit/construct.yaml b/examples/from_explicit/construct.yaml
index 9137fa8f..6e07790c 100644
--- a/examples/from_explicit/construct.yaml
+++ b/examples/from_explicit/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: Explicit
-version: X
+version: 1.0.0
 installer_type: all
 environment_file: explicit_linux-64.txt
 initialize_by_default: false
diff --git a/examples/miniconda/construct.yaml b/examples/miniconda/construct.yaml
index 7c5dad48..a8b8308b 100644
--- a/examples/miniconda/construct.yaml
+++ b/examples/miniconda/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: MinicondaX
-version: X
+version: 1.0.0
 installer_type: all
 
 channels:
diff --git a/examples/mirrored_channels/construct.yaml b/examples/mirrored_channels/construct.yaml
index f105c6d0..6e7ab9d8 100644
--- a/examples/mirrored_channels/construct.yaml
+++ b/examples/mirrored_channels/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: Mirrors
-version: X
+version: 1.0.0
 
 channels:
   - conda-forge
diff --git a/examples/noconda/constructor_input.yaml b/examples/noconda/constructor_input.yaml
index 5e3fa6fd..d2d96575 100644
--- a/examples/noconda/constructor_input.yaml
+++ b/examples/noconda/constructor_input.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: NoConda
-version: X
+version: 1.0.0
 installer_type: all
 channels:
   - http://repo.anaconda.com/pkgs/main/
diff --git a/examples/outputs/construct.yaml b/examples/outputs/construct.yaml
index 01aa24a0..9080dc36 100644
--- a/examples/outputs/construct.yaml
+++ b/examples/outputs/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: Outputs
-version: X
+version: 1.0.0
 installer_type: sh  # [unix]
 installer_type: exe  # [win]
 channels:
diff --git a/examples/protected_base/construct.yaml b/examples/protected_base/construct.yaml
index c4304476..56581b6c 100644
--- a/examples/protected_base/construct.yaml
+++ b/examples/protected_base/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: ProtectedBaseEnv
-version: X
+version: 1.0.0
 installer_type: all
 
 channels:
diff --git a/examples/register_envs/construct.yaml b/examples/register_envs/construct.yaml
index b55eae9e..1a75593b 100644
--- a/examples/register_envs/construct.yaml
+++ b/examples/register_envs/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: RegisterEnvs
-version: X
+version: 1.0.0
 installer_type: all
 channels:
   - http://repo.anaconda.com/pkgs/main/
diff --git a/examples/scripts/construct.yaml b/examples/scripts/construct.yaml
index 935b1f40..48e37248 100644
--- a/examples/scripts/construct.yaml
+++ b/examples/scripts/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: Scripts
-version: X
+version: 1.0.0
 installer_type: all
 channels:
   - http://repo.anaconda.com/pkgs/main/
diff --git a/examples/shortcuts/construct.yaml b/examples/shortcuts/construct.yaml
index b237e83c..c2d50c94 100644
--- a/examples/shortcuts/construct.yaml
+++ b/examples/shortcuts/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: MinicondaWithShortcuts
-version: X
+version: 1.0.0
 installer_type: all
 
 channels:
diff --git a/examples/signing/construct.yaml b/examples/signing/construct.yaml
index 06ce44d0..87d102e2 100644
--- a/examples/signing/construct.yaml
+++ b/examples/signing/construct.yaml
@@ -2,7 +2,7 @@
 "$schema": "../../constructor/data/construct.schema.json"
 
 name: Signed
-version: X
+version: 1.0.0
 installer_type: all
 channels:
   - http://repo.anaconda.com/pkgs/main/
diff --git a/tests/test_main.py b/tests/test_main.py
index 71aa79fd..003d9132 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -7,7 +7,7 @@ def test_dry_run(tmp_path):
     inputfile = dedent(
         """
         name: test_schema_validation
-        version: X
+        version: 1.0.0
         installer_type: all
         channels:
           - http://repo.anaconda.com/pkgs/main/

From fc95186f52c2c3e7774edccc76afcac34aef8a60 Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Thu, 13 Nov 2025 14:45:36 -0500
Subject: [PATCH 08/13] Add initial test changes

---
 tests/test_examples.py | 135 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 119 insertions(+), 16 deletions(-)

diff --git a/tests/test_examples.py b/tests/test_examples.py
index 4e0f84b0..0690cbfc 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -14,6 +14,7 @@
 from pathlib import Path
 from plistlib import load as plist_load
 from typing import TYPE_CHECKING
+import ctypes
 
 import pytest
 from conda.base.context import context
@@ -167,9 +168,6 @@ def _run_installer_exe(
         _check_installer_log(install_dir)
     return process
 
-def _run_uninstaller_windows():
-    print("TODO")
-
 def _run_uninstaller_exe(
     install_dir: Path,
     timeout: int = 420,
@@ -288,6 +286,73 @@ def _sentinel_file_checks(example_path, install_dir):
                 f"{install_dir} contents:\n" + "\n".join(sorted(map(str, install_dir.iterdir())))
             )
 
+def is_admin() -> bool:
+    try:
+        return ctypes.windll.shell32.IsUserAnAdmin()
+    except Exception:
+        return False
+
+def calculate_msi_install_path(installer: Path) -> Path:
+    """ This is a temporary solution for now since we cannot choose the install location ourselves.
+        Installers are named <name>-<version>-Windows-x86_64.msi.
+    """
+    dir_name = installer.name.replace('-Windows-x86_64.msi', '').replace('-', ' ')
+    if is_admin():
+        root_dir = Path(os.environ.get('PROGRAMFILES') or r"C:\Program Files")
+    else:
+        local_dir = os.environ.get('LOCALAPPDATA') or str(Path.home() / r"AppData\Local")
+        root_dir = Path(local_dir) / 'Programs'
+    return Path(root_dir) / dir_name
+
+
+def _run_installer_msi(
+    installer: Path,
+    install_dir: Path,
+    installer_input=None,
+    timeout=420,
+    check=True,
+    options: list | None = None,
+):
+    """
+    TODO
+    """
+    if not sys.platform.startswith("win"):
+        raise ValueError("Can only run .msi installers on Windows")
+    options = options or []
+    cmd = [
+        "msiexec.exe",
+        "/i",
+        str(installer),
+        "ALLUSERS=1" if is_admin() else "MSIINSTALLPERUSER=1",
+        "/qn",
+    ]
+
+    log_path = Path(os.environ.get('TEMP')) / (install_dir.name + ".log")
+    cmd.extend(["/L*V", str(log_path)])
+    process = _execute(cmd, installer_input=installer_input, timeout=timeout, check=check)
+    if check:
+        print("post install checks for MSI Installers not yet implemented")
+    return process
+
+def _run_uninstaller_msi(installer: Path,
+    install_dir: Path,
+    timeout: int = 420,
+    check: bool = True,
+) -> subprocess.CompletedProcess | None:
+
+    cmd = [
+        "msiexec.exe",
+        "/x",
+        str(installer),
+        "/qn",
+    ]
+    process = _execute(cmd, timeout=timeout, check=check)
+    if check:
+        # TODO:
+        # Check log and if there are remaining files, similar to the exe installers
+        pass
+
+    return process
 
 def _run_installer(
     example_path: Path,
@@ -334,12 +399,30 @@ def _run_installer(
             timeout=timeout,
             check=check_subprocess,
         )
+    elif installer.suffix == ".msi":
+        process = _run_installer_msi(
+            installer,
+            install_dir,
+            installer_input=installer_input,
+            timeout=timeout,
+            check=check_subprocess,
+            options=options,
+        )
     else:
         raise ValueError(f"Unknown installer type: {installer.suffix}")
-    if check_sentinels and not (installer.suffix == ".pkg" and ON_CI):
+
+    if installer.suffix == ".msi":
+        print("sentinel_file_checks for MSI installers not yet implemented")
+    elif check_sentinels and not (installer.suffix == ".pkg" and ON_CI):
         _sentinel_file_checks(example_path, install_dir)
-    if uninstall and installer.suffix == ".exe":
-        _run_uninstaller_exe(install_dir, timeout=timeout, check=check_subprocess)
+    if uninstall:
+        if installer.suffix == ".msi":
+            if request: #  and ON_CI
+                # We always need to do this currently since uninstall doesnt work fully
+                request.addfinalizer(lambda: shutil.rmtree(str(install_dir), ignore_errors=True))
+            _run_uninstaller_msi(installer, install_dir, timeout=timeout, check=check_subprocess)
+        elif installer.suffix == ".exe":
+            _run_uninstaller_exe(install_dir, timeout=timeout, check=check_subprocess)
     return process
 
 
@@ -361,17 +444,19 @@ def create_installer(
     output_dir.mkdir(parents=True, exist_ok=True)
     cmd = [
         *COV_CMD,
-        "constructor",
+        "constructor"]
+    # This flag will (if enabled) create a lot of output upon test failures for .exe-installers.
+    # If debugging generated NSIS templates, it can be worth to enable.
+    if CONSTRUCTOR_VERBOSE:
+        cmd.append("-v")
+    cmd += [
         str(input_dir),
         "--output-dir",
         str(output_dir),
         "--config-filename",
         config_filename,
     ]
-    # This flag will (if enabled) create a lot of output upon test failures for .exe-installers.
-    # If debugging generated NSIS templates, it can be worth to enable.
-    if CONSTRUCTOR_VERBOSE:
-        cmd.insert(2, "-v")
+
     if conda_exe:
         cmd.extend(["--conda-exe", conda_exe])
     if debug:
@@ -385,18 +470,21 @@ def create_installer(
 
     def _sort_by_extension(path):
         "Return shell installers first so they are run before the GUI ones"
-        return {"sh": 1, "pkg": 2, "exe": 3}[path.suffix[1:]], path
+        return {"sh": 1, "pkg": 2, "exe": 3, "msi": 4}[path.suffix[1:]], path
 
-    installers = (p for p in output_dir.iterdir() if p.suffix in (".exe", ".sh", ".pkg"))
+    installers = (p for p in output_dir.iterdir() if p.suffix in (".exe", ".msi", ".sh", ".pkg"))
     for installer in sorted(installers, key=_sort_by_extension):
         if installer.suffix == ".pkg" and ON_CI:
             install_dir = Path("~").expanduser() / calculate_install_dir(
                 input_dir / config_filename
             )
+        elif installer.suffix == '.msi':
+            install_dir = calculate_msi_install_path(installer)
         else:
             install_dir = (
                 workspace / f"{install_dir_prefix}-{installer.stem}-{installer.suffix[1:]}"
             )
+
         yield installer, install_dir
         if KEEP_ARTIFACTS_PATH:
             try:
@@ -484,7 +572,10 @@ def test_example_extra_envs(tmp_path, request):
             assert "@EXPLICIT" in envtxt.read_text()
 
         if sys.platform.startswith("win"):
-            _run_uninstaller_exe(install_dir=install_dir)
+            if installer.suffix == ".msi":
+                _run_uninstaller_msi(installer, install_dir, timeout=timeout, check=check_subprocess)
+            else:
+                _run_uninstaller_exe(install_dir=install_dir)
 
 
 def test_example_extra_files(tmp_path, request):
@@ -571,6 +662,10 @@ def test_example_miniforge(tmp_path, request, example):
                     raise AssertionError("Could not find Start Menu folder for miniforge")
                 _run_uninstaller_exe(install_dir)
                 assert not list(start_menu_dir.glob("Miniforge*.lnk"))
+            elif installer.suffix == '.msi':
+                # TODO: Start menus
+                _run_uninstaller_msi(installer, install_dir)
+                raise Exception("Test needs to be implemented")
 
 
 def test_example_noconda(tmp_path, request):
@@ -733,7 +828,10 @@ def test_example_shortcuts(tmp_path, request):
                     break
             else:
                 raise AssertionError("No shortcuts found!")
-            _run_uninstaller_exe(install_dir)
+            if installer.suffix == '.msi':
+                _run_uninstaller_msi(installer, install_dir)
+            else:
+                _run_uninstaller_exe(install_dir)
             assert not (package_1 / "A.lnk").is_file()
             assert not (package_1 / "B.lnk").is_file()
         elif sys.platform == "darwin":
@@ -1029,6 +1127,8 @@ def test_initialization(tmp_path, request, monkeypatch, method):
             # GHA runs on an admin user account, but AllUsers (admin) installs
             # do not add to PATH due to CVE-2022-26526, so force single user install
             options = ["/AddToPath=1", "/InstallationType=JustMe"]
+        elif installer.suffix == ".msi":
+            raise Exception("Test needs to be implemented")
         else:
             options = []
         _run_installer(
@@ -1064,6 +1164,8 @@ def test_initialization(tmp_path, request, monkeypatch, method):
 
             finally:
                 _run_uninstaller_exe(install_dir, check=True)
+        elif installer.suffix == ".msi":
+            raise Exception("Test needs to be implemented")
         else:
             # GHA's Ubuntu needs interactive, but macOS wants login :shrug:
             login_flag = "-i" if sys.platform.startswith("linux") else "-l"
@@ -1317,7 +1419,8 @@ def test_uninstallation_standalone(
         check_subprocess=True,
         uninstall=False,
     )
-
+    if installer.suffix == ".msi":
+        raise Exception("Test needs to be implemented")
     # Set up files for removal.
     # Since conda-standalone is extensively tested upstream,
     # only set up a minimum set of files.

From 2aeddae4276833348df70b01baf1f4836e5e313f Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Thu, 13 Nov 2025 15:41:17 -0500
Subject: [PATCH 09/13] More fixes

---
 tests/test_examples.py | 66 +++++++++++++++++++++++++++---------------
 1 file changed, 43 insertions(+), 23 deletions(-)

diff --git a/tests/test_examples.py b/tests/test_examples.py
index 0690cbfc..8e94caea 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import ctypes
 import getpass
 import json
 import os
@@ -14,7 +15,6 @@
 from pathlib import Path
 from plistlib import load as plist_load
 from typing import TYPE_CHECKING
-import ctypes
 
 import pytest
 from conda.base.context import context
@@ -168,6 +168,7 @@ def _run_installer_exe(
         _check_installer_log(install_dir)
     return process
 
+
 def _run_uninstaller_exe(
     install_dir: Path,
     timeout: int = 420,
@@ -286,22 +287,24 @@ def _sentinel_file_checks(example_path, install_dir):
                 f"{install_dir} contents:\n" + "\n".join(sorted(map(str, install_dir.iterdir())))
             )
 
+
 def is_admin() -> bool:
     try:
         return ctypes.windll.shell32.IsUserAnAdmin()
     except Exception:
         return False
 
+
 def calculate_msi_install_path(installer: Path) -> Path:
-    """ This is a temporary solution for now since we cannot choose the install location ourselves.
-        Installers are named <name>-<version>-Windows-x86_64.msi.
+    """This is a temporary solution for now since we cannot choose the install location ourselves.
+    Installers are named <name>-<version>-Windows-x86_64.msi.
     """
-    dir_name = installer.name.replace('-Windows-x86_64.msi', '').replace('-', ' ')
+    dir_name = installer.name.replace("-Windows-x86_64.msi", "").replace("-", " ")
     if is_admin():
-        root_dir = Path(os.environ.get('PROGRAMFILES') or r"C:\Program Files")
+        root_dir = Path(os.environ.get("PROGRAMFILES") or r"C:\Program Files")
     else:
-        local_dir = os.environ.get('LOCALAPPDATA') or str(Path.home() / r"AppData\Local")
-        root_dir = Path(local_dir) / 'Programs'
+        local_dir = os.environ.get("LOCALAPPDATA") or str(Path.home() / r"AppData\Local")
+        root_dir = Path(local_dir) / "Programs"
     return Path(root_dir) / dir_name
 
 
@@ -313,9 +316,7 @@ def _run_installer_msi(
     check=True,
     options: list | None = None,
 ):
-    """
-    TODO
-    """
+    """Runs specified MSI Installer via command line in silent mode. This is work in progress."""
     if not sys.platform.startswith("win"):
         raise ValueError("Can only run .msi installers on Windows")
     options = options or []
@@ -327,19 +328,20 @@ def _run_installer_msi(
         "/qn",
     ]
 
-    log_path = Path(os.environ.get('TEMP')) / (install_dir.name + ".log")
+    log_path = Path(os.environ.get("TEMP")) / (install_dir.name + ".log")
     cmd.extend(["/L*V", str(log_path)])
     process = _execute(cmd, installer_input=installer_input, timeout=timeout, check=check)
     if check:
-        print("post install checks for MSI Installers not yet implemented")
+        print("A check for MSI Installers not yet implemented")
     return process
 
-def _run_uninstaller_msi(installer: Path,
+
+def _run_uninstaller_msi(
+    installer: Path,
     install_dir: Path,
     timeout: int = 420,
     check: bool = True,
 ) -> subprocess.CompletedProcess | None:
-
     cmd = [
         "msiexec.exe",
         "/x",
@@ -354,6 +356,7 @@ def _run_uninstaller_msi(installer: Path,
 
     return process
 
+
 def _run_installer(
     example_path: Path,
     installer: Path,
@@ -417,7 +420,7 @@ def _run_installer(
         _sentinel_file_checks(example_path, install_dir)
     if uninstall:
         if installer.suffix == ".msi":
-            if request: #  and ON_CI
+            if request:  #  and ON_CI
                 # We always need to do this currently since uninstall doesnt work fully
                 request.addfinalizer(lambda: shutil.rmtree(str(install_dir), ignore_errors=True))
             _run_uninstaller_msi(installer, install_dir, timeout=timeout, check=check_subprocess)
@@ -442,9 +445,7 @@ def create_installer(
 
     output_dir = workspace / "installer"
     output_dir.mkdir(parents=True, exist_ok=True)
-    cmd = [
-        *COV_CMD,
-        "constructor"]
+    cmd = [*COV_CMD, "constructor"]
     # This flag will (if enabled) create a lot of output upon test failures for .exe-installers.
     # If debugging generated NSIS templates, it can be worth to enable.
     if CONSTRUCTOR_VERBOSE:
@@ -478,7 +479,7 @@ def _sort_by_extension(path):
             install_dir = Path("~").expanduser() / calculate_install_dir(
                 input_dir / config_filename
             )
-        elif installer.suffix == '.msi':
+        elif installer.suffix == ".msi":
             install_dir = calculate_msi_install_path(installer)
         else:
             install_dir = (
@@ -573,7 +574,11 @@ def test_example_extra_envs(tmp_path, request):
 
         if sys.platform.startswith("win"):
             if installer.suffix == ".msi":
-                _run_uninstaller_msi(installer, install_dir, timeout=timeout, check=check_subprocess)
+                if request:
+                    request.addfinalizer(
+                        lambda: shutil.rmtree(str(install_dir), ignore_errors=True)
+                    )
+                _run_uninstaller_msi(installer, install_dir)
             else:
                 _run_uninstaller_exe(install_dir=install_dir)
 
@@ -587,7 +592,7 @@ def test_example_extra_files(tmp_path, request):
             install_dir,
             request=request,
             check_sentinels=CONSTRUCTOR_VERBOSE,
-            check_subprocess=CONSTRUCTOR_VERBOSE
+            check_subprocess=CONSTRUCTOR_VERBOSE,
         )
 
 
@@ -662,8 +667,12 @@ def test_example_miniforge(tmp_path, request, example):
                     raise AssertionError("Could not find Start Menu folder for miniforge")
                 _run_uninstaller_exe(install_dir)
                 assert not list(start_menu_dir.glob("Miniforge*.lnk"))
-            elif installer.suffix == '.msi':
+            elif installer.suffix == ".msi":
                 # TODO: Start menus
+                if request:
+                    request.addfinalizer(
+                        lambda: shutil.rmtree(str(install_dir), ignore_errors=True)
+                    )
                 _run_uninstaller_msi(installer, install_dir)
                 raise Exception("Test needs to be implemented")
 
@@ -828,7 +837,11 @@ def test_example_shortcuts(tmp_path, request):
                     break
             else:
                 raise AssertionError("No shortcuts found!")
-            if installer.suffix == '.msi':
+            if installer.suffix == ".msi":
+                if request:
+                    request.addfinalizer(
+                        lambda: shutil.rmtree(str(install_dir), ignore_errors=True)
+                    )
                 _run_uninstaller_msi(installer, install_dir)
             else:
                 _run_uninstaller_exe(install_dir)
@@ -973,8 +986,11 @@ def test_example_from_explicit(tmp_path, request):
 
 
 def test_register_envs(tmp_path, request):
+    """Verify that 'register_envs: False' results in the environment not being registered."""
     input_path = _example_path("register_envs")
     for installer, install_dir in create_installer(input_path, tmp_path):
+        if installer.suffix == ".msi":
+            raise Exception("Test for 'register_envs' not yet implemented for MSI")
         _run_installer(input_path, installer, install_dir, request=request)
         environments_txt = Path("~/.conda/environments.txt").expanduser().read_text()
         assert str(install_dir) not in environments_txt
@@ -1035,6 +1051,7 @@ def test_cross_osx_building(tmp_path):
     )
 
 
+@pytest.mark.skipif(sys.platform.startswith("win"), reason="Unix only")
 def test_cross_build_example(tmp_path, platform_conda_exe):
     platform, conda_exe = platform_conda_exe
     input_path = _example_path("virtual_specs_ok")
@@ -1050,6 +1067,7 @@ def test_cross_build_example(tmp_path, platform_conda_exe):
 
 
 def test_virtual_specs_failed(tmp_path, request):
+    """Verify that virtual packages listed via 'virtual_specs' are satisfied."""
     input_path = _example_path("virtual_specs_failed")
     for installer, install_dir in create_installer(input_path, tmp_path):
         process = _run_installer(
@@ -1065,6 +1083,8 @@ def test_virtual_specs_failed(tmp_path, request):
             with pytest.raises(AssertionError, match="Failed to check virtual specs"):
                 _check_installer_log(install_dir)
             continue
+        elif installer.suffix == ".msi":
+            raise Exception("Test for 'virtual_specs' not yet implemented for MSI")
         elif installer.suffix == ".pkg":
             if not ON_CI:
                 continue

From 946f89adef530a98131de09f8104638c64deb0ad Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Fri, 14 Nov 2025 13:26:27 -0500
Subject: [PATCH 10/13] Add dependency and env variable for github workflow

---
 .github/workflows/main.yml | 1 +
 pyproject.toml             | 1 +
 2 files changed, 2 insertions(+)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5287a935..2bb7c8ab 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -165,6 +165,7 @@ jobs:
           AZURE_SIGNTOOL_KEY_VAULT_URL: ${{ secrets.AZURE_SIGNTOOL_KEY_VAULT_URL }}
           CONSTRUCTOR_EXAMPLES_KEEP_ARTIFACTS: "${{ runner.temp }}/examples_artifacts"
           CONSTRUCTOR_SIGNTOOL_PATH: "C:/Program Files (x86)/Windows Kits/10/bin/10.0.26100.0/x86/signtool.exe"
+          CONSTRUCTOR_VERBOSE: 1
         run: |
           rm -rf coverage.json
           pytest -vv --cov=constructor --cov-branch tests/test_examples.py
diff --git a/pyproject.toml b/pyproject.toml
index 97eb1235..b3c48c75 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,6 +18,7 @@ dependencies = [
     "jinja2",
     "jsonschema >=4",
     "tomli-w >=1.2.0",
+    "breifcase"
 ]
 
 [project.optional-dependencies]

From 9be1852ffbb06eb906cfe448fe1f188c635baf2d Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Fri, 14 Nov 2025 14:16:52 -0500
Subject: [PATCH 11/13] Some more fixes

---
 constructor/briefcase.py                   | 7 +++++--
 constructor/briefcase/run_installation.bat | 7 ++++---
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/constructor/briefcase.py b/constructor/briefcase.py
index af569068..32b5679a 100644
--- a/constructor/briefcase.py
+++ b/constructor/briefcase.py
@@ -4,6 +4,7 @@
 
 import logging
 import re
+import sys
 import shutil
 import sysconfig
 import tempfile
@@ -22,8 +23,7 @@
 
 
 def get_name_version(info):
-    name = info["name"]
-    if not name:
+    if not (name := info.get("name")):
         raise ValueError("Name is empty")
 
     # Briefcase requires version numbers to be in the canonical Python format, and some
@@ -124,6 +124,9 @@ def write_pyproject_toml(tmp_dir, info):
 
 
 def create(info, verbose=False):
+    if sys.platform != 'win32':
+        raise Exception(f"Invalid platform '{sys.platform}'. Only Windows is supported.")
+
     tmp_dir = Path(tempfile.mkdtemp())
     write_pyproject_toml(tmp_dir, info)
 
diff --git a/constructor/briefcase/run_installation.bat b/constructor/briefcase/run_installation.bat
index 7f9e6c48..71c7b50f 100644
--- a/constructor/briefcase/run_installation.bat
+++ b/constructor/briefcase/run_installation.bat
@@ -1,9 +1,10 @@
-_conda constructor --prefix . --extract-conda-pkgs
-
 set CONDA_PROTECT_FROZEN_ENVS=0
 set CONDA_ROOT_PREFIX=%cd%
 set CONDA_SAFETY_CHECKS=disabled
 set CONDA_EXTRA_SAFETY_CHECKS=no
 set CONDA_PKGS_DIRS=%cd%\pkgs
 
-_conda install --offline --file conda-meta\initial-state.explicit.txt -yp .
+%CONDA_ROOT_PREFIX%\_conda constructor --prefix . --extract-conda-pkgs
+
+
+%CONDA_ROOT_PREFIX%\_conda install --offline --file conda-meta\initial-state.explicit.txt -yp .

From 6b940258ab5fcb0c3173ee843fb26440976cf04c Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Fri, 14 Nov 2025 14:32:42 -0500
Subject: [PATCH 12/13] Fix spelling error

---
 pyproject.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index b3c48c75..b3159dd4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ dependencies = [
     "jinja2",
     "jsonschema >=4",
     "tomli-w >=1.2.0",
-    "breifcase"
+    "briefcase"
 ]
 
 [project.optional-dependencies]

From 5d3c3cdf2eb15ca63bc4b20557c045bdcebb6e1e Mon Sep 17 00:00:00 2001
From: Robin <randersson@anaconda.com>
Date: Fri, 14 Nov 2025 15:00:13 -0500
Subject: [PATCH 13/13] Undo earlier change sine it wasn't the correct way

---
 constructor/briefcase/run_installation.bat | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/constructor/briefcase/run_installation.bat b/constructor/briefcase/run_installation.bat
index 71c7b50f..7f9e6c48 100644
--- a/constructor/briefcase/run_installation.bat
+++ b/constructor/briefcase/run_installation.bat
@@ -1,10 +1,9 @@
+_conda constructor --prefix . --extract-conda-pkgs
+
 set CONDA_PROTECT_FROZEN_ENVS=0
 set CONDA_ROOT_PREFIX=%cd%
 set CONDA_SAFETY_CHECKS=disabled
 set CONDA_EXTRA_SAFETY_CHECKS=no
 set CONDA_PKGS_DIRS=%cd%\pkgs
 
-%CONDA_ROOT_PREFIX%\_conda constructor --prefix . --extract-conda-pkgs
-
-
-%CONDA_ROOT_PREFIX%\_conda install --offline --file conda-meta\initial-state.explicit.txt -yp .
+_conda install --offline --file conda-meta\initial-state.explicit.txt -yp .