diff --git a/deploy/README.md b/deploy/README.md
index 23ec6c9..3922dce 100644
--- a/deploy/README.md
+++ b/deploy/README.md
@@ -35,5 +35,5 @@ For `xxx` there are:
 
 ## Hacking Stuff
 
-To deploy another branch than `production`, do `export DEPLOY_BRANCH=otherbranch` before starting
+To deploy another branch than `production`, do `export STAGING_BRANCH=otherbranch` before starting
 the above commands.
diff --git a/docker/3_buildwheels/build.sh b/docker/3_buildwheels/build.sh
index 21ab783..5a9d049 100755
--- a/docker/3_buildwheels/build.sh
+++ b/docker/3_buildwheels/build.sh
@@ -33,10 +33,15 @@ docker run --rm -i \
     -v "$TOPDEVDIR:/data/topdev" \
     $DOCKER_IMAGE_NAME <<EOT
 set -e
+set -x
+
+# Globally upgrade Pip, so that we can get a compatible version of the cryptography package.
+# See https://github.com/pyca/cryptography/issues/5771
+pip3 install --upgrade pip setuptools wheel
 
 # Pin poetry to 1.0, as more recent version to not support nested filesystem package
 # dependencies.
-pip3 install wheel poetry==1.0
+pip3 install wheel poetry==1.0 cryptography==2.7
 
 # Build wheels for all dependencies.
 cd /data/topdev/blender-cloud
diff --git a/poetry.lock b/poetry.lock
index 1cf6056..751e5cb 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -46,6 +46,7 @@ python-versions = "~3.6"
 version = "1.1dev0"
 
 [package.dependencies]
+cryptography = "2.7"
 pillar = "*"
 svn = "~0.3"
 
@@ -215,7 +216,6 @@ version = "7.0"
 [[package]]
 category = "dev"
 description = "Cross-platform colored terminal text."
-marker = "sys_platform == \"win32\""
 name = "colorama"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
@@ -345,6 +345,7 @@ python-versions = "~3.6"
 version = "2.3dev0"
 
 [package.dependencies]
+cryptography = "2.7"
 pillar = "*"
 pyjwt = "1.7.1"
 
@@ -702,7 +703,6 @@ version = "1.5"
 [[package]]
 category = "dev"
 description = "More routines for operating on iterables, beyond itertools"
-marker = "python_version > \"2.7\""
 name = "more-itertools"
 optional = false
 python-versions = ">=3.4"
@@ -780,8 +780,8 @@ attrs = "~19"
 bcrypt = "~3"
 bleach = "~3.1"
 blinker = "~1.4"
-celery = "~4.3"
 commonmark = "~0.9"
+cryptography = "2.7"
 elasticsearch = "~6.1"
 elasticsearch-dsl = "~6.1"
 gcloud = "~0.18"
@@ -791,11 +791,18 @@ ndg-httpsclient = "~0.5"
 pillarsdk = "*"
 python-dateutil = "~2.8"
 rauth = "~0.7"
-raven = "~6.10"
 redis = "~3.2"
 shortcodes = "~2.5"
 zencoder = "~0.6"
 
+[package.dependencies.celery]
+extras = ["redis"]
+version = "~4.3"
+
+[package.dependencies.raven]
+extras = ["flask"]
+version = "~6.10"
+
 [package.source]
 reference = ""
 type = "directory"
@@ -831,6 +838,7 @@ python-versions = "^3.5"
 version = "1.10"
 
 [package.dependencies]
+cryptography = "2.7"
 pyOpenSSL = "~19"
 requests = "~2"
 
@@ -1036,6 +1044,15 @@ optional = false
 python-versions = "*"
 version = "6.10.0"
 
+[package.dependencies]
+[package.dependencies.Flask]
+optional = true
+version = ">=0.8"
+
+[package.dependencies.blinker]
+optional = true
+version = ">=1.1"
+
 [package.extras]
 flask = ["Flask (>=0.8)", "blinker (>=1.1)"]
 tests = ["bottle", "celery (>=2.5)", "coverage (<4)", "exam (>=0.5.2)", "flake8 (3.5.0)", "logbook", "mock", "nose", "pytz", "pytest (>=3.2.0,<3.3.0)", "pytest-timeout (1.2.1)", "pytest-xdist (1.18.2)", "pytest-pythonpath (0.7.2)", "pytest-cov (2.5.1)", "pytest-flake8 (1.0.0)", "requests", "tornado (>=4.1,<5.0)", "tox", "webob", "webtest", "wheel", "anyjson", "zconfig", "Flask (>=0.8)", "blinker (>=1.1)", "Flask-Login (>=0.2.0)", "blinker (>=1.1)", "sanic (>=0.7.0)", "aiohttp"]
@@ -1141,6 +1158,7 @@ python-versions = "~3.6"
 version = "1.1dev0"
 
 [package.dependencies]
+cryptography = "2.7"
 pillar = "*"
 
 [package.source]
@@ -1197,6 +1215,17 @@ dev = ["pytest", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinx-i
 termcolor = ["termcolor"]
 watchdog = ["watchdog"]
 
+[[package]]
+category = "main"
+description = "A built-package format for Python"
+name = "wheel"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+version = "0.35.1"
+
+[package.extras]
+test = ["pytest (>=3.0.0)", "pytest-cov"]
+
 [[package]]
 category = "main"
 description = "A flexible forms validation and rendering library for Python web development."
@@ -1232,7 +1261,7 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["pathlib2", "contextlib2", "unittest2"]
 
 [metadata]
-content-hash = "265c6813c52bdf5230bc37b324a171cd457bb8ba13629afce81724cc8b5d1a01"
+content-hash = "118d1166a7f31cbd59191bd86521cf9a80a1f537f747bb7d4d5be0bfec71b45d"
 python-versions = "~3.6"
 
 [metadata.files]
@@ -1871,6 +1900,10 @@ werkzeug = [
     {file = "Werkzeug-0.15.4-py2.py3-none-any.whl", hash = "sha256:865856ebb55c4dcd0630cdd8f3331a1847a819dda7e8c750d3db6f2aa6c0209c"},
     {file = "Werkzeug-0.15.4.tar.gz", hash = "sha256:a0b915f0815982fb2a09161cb8f31708052d0951c3ba433ccc5e1aa276507ca6"},
 ]
+wheel = [
+    {file = "wheel-0.35.1-py2.py3-none-any.whl", hash = "sha256:497add53525d16c173c2c1c733b8f655510e909ea78cc0e29d374243544b77a2"},
+    {file = "wheel-0.35.1.tar.gz", hash = "sha256:99a22d87add3f634ff917310a3d87e499f19e663413a52eb9232c447aa646c9f"},
+]
 wtforms = [
     {file = "WTForms-2.2.1-py2.py3-none-any.whl", hash = "sha256:e3ee092c827582c50877cdbd49e9ce6d2c5c1f6561f849b3b068c1b8029626f1"},
     {file = "WTForms-2.2.1.tar.gz", hash = "sha256:0cdbac3e7f6878086c334aa25dc5a33869a3954e9d1e015130d65a69309b3b61"},
diff --git a/pyproject.toml b/pyproject.toml
index 4b6b30a..72d6a84 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,11 +15,61 @@ pillar = {path = "../pillar"}
 attract = {path = "../attract"}
 flamenco = {path = "../flamenco"}
 svnman = {path = "../pillar-svnman"}
+amqp = "2.5.0"
+asn1crypto = "0.24.0"
+attrs = "19.1.0"
+babel = "2.7.0"
+bcrypt = "3.1.6"
+billiard = "3.6.0.0"
+bleach = "3.1.0"
+celery = "4.3.0"
+cerberus = "1.3.1"
+certifi = "2019.3.9"
+cffi = "1.12.3"
+chardet = "3.0.4"
+click = "7.0"
+commonmark = "0.9.0"
+cryptography = "2.7"
+eve = "0.9.1"
+fasteners = "0.15"
+flask = "1.0.3"
+flask-wtf = "0.14.2"
+future = "0.17.1"
+google-apitools = "0.5.28"
+googleapis-common-protos = "1.6.0"
+grpcio = "1.21.1"
+httplib2 = "0.12.3"
+ipaddress = "1.0.22"
+jinja2 = "2.10.1"
+kombu = "4.6.0"
+protobuf = "3.8.0"
+pyasn1 = "0.4.5"
+pyasn1-modules = "0.2.5"
+pycparser = "2.19"
+pymongo = "3.8.0"
+pyopenssl = "19.0.0"
+pytz = "2019.1"
+requests = "2.22.0"
+rsa = "4.0"
+setuptools = "51.0.0"
+shortcodes = "2.5.0"
+simplejson = "3.16.0"
+six = "1.12.0"
+wheel = "0.35.1"
+wtforms = "2.2.1"
 
 [tool.poetry.dev-dependencies]
 pillar-devdeps = {path = "../pillar/devdeps"}
-
+responses = "0.10.6"
+zipp = "0.5.1"
+py = "1.8.0"
+colorama = "0.4.1"
+importlib-metadata = "0.17"
+more-itertools = "7.0.0"
+coverage = "4.5.3"
+pluggy = "0.12.0"
+atomicwrites = "1.3.0"
 
 [build-system]
-requires = ["poetry>=0.12"]
+requires = ["poetry==1.0","cryptography==2.7","setuptools==51.0.0","wheel==0.35.1"]
 build-backend = "poetry.masonry.api"