diff --git a/contrib/packaging/hgpackaging/wix.py b/contrib/packaging/hgpackaging/wix.py
--- a/contrib/packaging/hgpackaging/wix.py
+++ b/contrib/packaging/hgpackaging/wix.py
@@ -31,8 +31,11 @@
 
 
 EXTRA_PACKAGES = {
+    'dulwich',
     'distutils',
+    'keyring',
     'pygments',
+    'win32ctypes',
 }
 
 
diff --git a/contrib/packaging/wix/requirements.txt b/contrib/packaging/wix/requirements.txt
--- a/contrib/packaging/wix/requirements.txt
+++ b/contrib/packaging/wix/requirements.txt
@@ -4,10 +4,42 @@
 #
 #    pip-compile --generate-hashes --output-file=contrib/packaging/wix/requirements.txt contrib/packaging/wix/requirements.txt.in
 #
+certifi==2019.9.11 \
+    --hash=sha256:e4f3620cfea4f83eedc95b24abd9cd56f3c4b146dd0177e83a21b4eb49e21e50 \
+    --hash=sha256:fd7c7c74727ddcf00e9acd26bba8da604ffec95bf1c2144e67aff7a8b50e6cef \
+    # via dulwich
+configparser==4.0.2 \
+    --hash=sha256:254c1d9c79f60c45dfde850850883d5aaa7f19a23f13561243a050d5a7c3fe4c \
+    --hash=sha256:c7d282687a5308319bf3d2e7706e575c635b0a470342641c93bea0ea3b5331df \
+    # via entrypoints
 docutils==0.15.2 \
     --hash=sha256:6c4f696463b79f1fb8ba0c594b63840ebd41f059e92b31957c46b74a4599b6d0 \
     --hash=sha256:9e4d7ecfc600058e07ba661411a2b7de2fd0fafa17d1a7f7361cd47b1175c827 \
     --hash=sha256:a2aeea129088da402665e92e0b25b04b073c04b2dce4ab65caaa38b7ce2e1a99
+dulwich==0.19.13 \
+    --hash=sha256:0e442f6f96e6d97270a7cca4e75306b6b0228627bdf57dde3759e0e345a6b523 \
+    --hash=sha256:667f49536ccba09d3b90bac80d44048e45566f84b98a5e139cc8c70757a6ae60 \
+    --hash=sha256:82792a9d49b112fa2151fa0fb29b01667855a843ff99325b1c1578a4aec11b57 \
+    --hash=sha256:aa628449c5f594a9a282f4d9e5993fef65481ef5e3b9b6c52ff31200f8f5dc95 \
+    --hash=sha256:ab4668bc4e1996d12eb1910e123a09edcff8e166e7ec46db5aafb5c7e250b99f \
+    --hash=sha256:c35ed2cd5b263ce0d67758ffba590c0466ff13b048457ff060b7d2e6cb55a40e \
+    --hash=sha256:c8b48079a14850cbeb788b38e1061ae6db75061431c1c0f91382460be4c84bbe \
+    --hash=sha256:dfcd9943c69f963dd61a027f480d16f548ea5905c2485be8f4b8f130df2c32de \
+    --hash=sha256:e3693c3238c1a5fc1e4427281c4455d78549f4797f2a7107a5f4443b21efafb4
+entrypoints==0.3 \
+    --hash=sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19 \
+    --hash=sha256:c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451 \
+    # via keyring
+keyring==18.0.1 \
+    --hash=sha256:67d6cc0132bd77922725fae9f18366bb314fd8f95ff4d323a4df41890a96a838 \
+    --hash=sha256:7b29ebfcf8678c4da531b2478a912eea01e80007e5ddca9ee0c7038cb3489ec6
 pygments==2.4.2 \
     --hash=sha256:71e430bc85c88a430f000ac1d9b331d2407f681d6f6aec95e8bcfbc3df5b0127 \
     --hash=sha256:881c4c157e45f30af185c1ffe8d549d48ac9127433f2c380c24b84572ad66297
+pywin32-ctypes==0.2.0 \
+    --hash=sha256:24ffc3b341d457d48e8922352130cf2644024a4ff09762a2261fd34c36ee5942 \
+    --hash=sha256:9dc2d991b3479cc2df15930958b674a48a227d5361d413827a4cfd0b5876fc98
+urllib3==1.25.6 \
+    --hash=sha256:3de946ffbed6e6746608990594d08faac602528ac7015ac28d33cee6a45b7398 \
+    --hash=sha256:9a107b99a5393caf59c7aa3c1249c16e6879447533d0887f4336dde834c7be86 \
+    # via dulwich
diff --git a/contrib/packaging/wix/requirements.txt.in b/contrib/packaging/wix/requirements.txt.in
--- a/contrib/packaging/wix/requirements.txt.in
+++ b/contrib/packaging/wix/requirements.txt.in
@@ -1,2 +1,7 @@
 docutils
+dulwich
+keyring
 pygments
+# Need to list explicitly so dependency gets pulled in when
+# not running on Windows.
+pywin32-ctypes