pip unable to find wheel files

I am using the following command to install an application from a directory pre-populated with .whl files:

pip install --find-links=/tmp/wheelhouse --no-index uwsgi myapp

Here are the contents of /tmp/wheelhouse

drwxrwxrwt 3 root root 4.0K Aug 28 07:37 ..
-rw-r--r-- 1 root root 3.5M Aug 28 07:36 Babel-2.1.1-py2.py3-none-any.whl
-rw-r--r-- 1 root root 114K Aug 28 07:36 Flask-0.10.1-py2-none-any.whl
-rw-r--r-- 1 root root  15K Aug 28 07:36 Flask_Cors-1.10.3-py2-none-any.whl
-rw-r--r-- 1 root root  18K Aug 28 07:36 Flask_JWT_Extended-3.8.1-py2.py3-none-any.whl
-rw-r--r-- 1 root root 124K Aug 28 07:36 Jinja2-2.10-py2.py3-none-any.whl
-rw-r--r-- 1 root root  76K Aug 28 07:36 Mako-1.0.7-py2-none-any.whl
-rw-r--r-- 1 root root  25K Aug 28 07:36 MarkupSafe-1.0-cp27-cp27mu-linux_x86_64.whl
-rw-r--r-- 1 root root  29K Aug 28 07:36 PTable-0.9.2-py2-none-any.whl
-rw-r--r-- 1 root root  20K Aug 28 07:36 PyJWT-1.6.4-py2.py3-none-any.whl
-rw-r--r-- 1 root root  69K Aug 28 07:36 PyMySQL-0.6.7-py2.py3-none-any.whl
-rw-r--r-- 1 root root  44K Aug 28 07:36 PyYAML-3.11-cp27-cp27mu-linux_x86_64.whl
-rw-r--r-- 1 root root 977K Aug 28 07:36 SQLAlchemy-1.0.9-cp27-cp27mu-linux_x86_64.whl
-rw-r--r-- 1 root root 316K Aug 28 07:36 Werkzeug-0.14.1-py2.py3-none-any.whl
-rw-r--r-- 1 root root 144K Aug 28 07:36 alembic-0.8.6-py2.py3-none-any.whl
-rw-r--r-- 1 root root  51K Aug 28 07:36 amqp-1.4.9-py2.py3-none-any.whl
-rw-r--r-- 1 root root  22K Aug 28 07:36 aniso8601-3.0.2-py2.py3-none-any.whl
-rw-r--r-- 1 root root 5.6K Aug 28 07:36 anyjson-0.3.3-py2-none-any.whl
-rw-r--r-- 1 root root 100K Aug 28 07:36 asn1crypto-0.24.0-py2.py3-none-any.whl
-rw-r--r-- 1 root root 144K Aug 28 07:36 certifi-2018.8.24-py2.py3-none-any.whl
-rw-r--r-- 1 root root 398K Aug 28 07:36 cffi-1.11.5-cp27-cp27mu-manylinux1_x86_64.whl
-rw-r--r-- 1 root root 131K Aug 28 07:36 chardet-3.0.4-py2.py3-none-any.whl
-rw-r--r-- 1 root root 2.1M Aug 28 07:36 cryptography-2.3.1-cp27-cp27mu-manylinux1_x86_64.whl
-rw-r--r-- 1 root root 9.1K Aug 28 07:36 decorator-4.3.0-py2.py3-none-any.whl
-rw-r--r-- 1 root root 169K Aug 28 07:37 dnspython-1.14.0-py2-none-any.whl
-rw-r--r-- 1 root root  55K Aug 28 07:36 domain_lexicographical_analysis-0.6.0-py2-none-any.whl
-rw-r--r-- 1 root root 118K Aug 28 07:36 elasticsearch-6.3.1-py2.py3-none-any.whl
-rw-r--r-- 1 root root  48K Aug 28 07:36 elasticsearch_dsl-6.2.1-py2.py3-none-any.whl
-rw-r--r-- 1 root root 9.0K Aug 28 07:36 myapp_ls_pyclient-0.2.0-py2-none-any.whl
-rw-r--r-- 1 root root 166K Aug 28 07:36 myapp-1.4.2-py2-none-any.whl
-rw-r--r-- 1 root root  24K Aug 28 07:36 enorasys_swissknife-0.1.0-py2-none-any.whl
-rw-r--r-- 1 root root  13K Aug 28 07:36 enum34-1.1.6-py2-none-any.whl
-rw-r--r-- 1 root root 882K Aug 28 07:36 flask_restplus-0.9.0-py2.py3-none-any.whl
-rw-r--r-- 1 root root  11K Aug 28 07:36 functools32-3.2.3.post2-py2-none-any.whl
-rw-r--r-- 1 root root 489K Aug 28 07:37 future-0.16.0-py2-none-any.whl
-rw-r--r-- 1 root root  14K Aug 28 07:36 futures-3.0.5-py2-none-any.whl
-rw-r--r-- 1 root root  18K Aug 28 07:36 geoip2-2.9.0-py2.py3-none-any.whl
-rw-r--r-- 1 root root  45K Aug 28 07:36 hiredis-0.2.0-cp27-cp27mu-manylinux1_x86_64.whl
-rw-r--r-- 1 root root  57K Aug 28 07:36 idna-2.7-py2.py3-none-any.whl
-rw-r--r-- 1 root root  15K Aug 28 07:37 ipaddr-2.2.0-py2-none-any.whl
-rw-r--r-- 1 root root  18K Aug 28 07:36 ipaddress-1.0.22-py2.py3-none-any.whl
-rw-r--r-- 1 root root  79K Aug 28 07:36 ipwhois-1.0.0-py2.py3-none-any.whl
-rw-r--r-- 1 root root  11K Aug 28 07:36 itsdangerous-0.24-py2-none-any.whl
-rw-r--r-- 1 root root  39K Aug 28 07:36 jsonschema-2.6.0-py2.py3-none-any.whl
-rw-r--r-- 1 root root 235K Aug 28 07:36 kombu-3.0.35-py2.py3-none-any.whl
-rw-r--r-- 1 root root 5.6M Aug 28 07:36 lxml-4.2.4-cp27-cp27mu-manylinux1_x86_64.whl
-rw-r--r-- 1 root root  17K Aug 28 07:37 maxminddb-1.4.1-py2-none-any.whl
-rw-r--r-- 1 root root 1.5M Aug 28 07:36 netaddr-0.7.18-py2.py3-none-any.whl
-rw-r--r-- 1 root root 1.3M Aug 28 07:36 networkx-1.11-py2.py3-none-any.whl
-rw-r--r-- 1 root root  14M Aug 28 07:36 numpy-1.15.1-cp27-cp27mu-manylinux1_x86_64.whl
-rw-r--r-- 1 root root 194K Aug 28 07:36 psutil-5.2.2-cp27-cp27mu-linux_x86_64.whl
-rw-r--r-- 1 root root  84K Aug 28 07:36 publicsuffix2-2.20160818-py2.py3-none-any.whl
-rw-r--r-- 1 root root 203K Aug 28 07:37 pycparser-2.18-py2.py3-none-any.whl
-rw-r--r-- 1 root root 197K Aug 28 07:36 python_dateutil-2.5.2-py2.py3-none-any.whl
-rw-r--r-- 1 root root 3.5K Aug 28 07:36 python_editor-1.0.3-py2-none-any.whl
-rw-r--r-- 1 root root  79K Aug 28 07:37 python_whois-0.7.0-py2-none-any.whl
-rw-r--r-- 1 root root 499K Aug 28 07:36 pytz-2018.5-py2.py3-none-any.whl
-rw-r--r-- 1 root root  60K Aug 28 07:36 redis-2.10.5-py2.py3-none-any.whl
-rw-r--r-- 1 root root  90K Aug 28 07:36 requests-2.19.1-py2.py3-none-any.whl
-rw-r--r-- 1 root root  37K Aug 28 07:36 sas-1.2.0-py2-none-any.whl
-rw-r--r-- 1 root root 4.8M Aug 28 07:36 scikit_learn-0.19.2-cp27-cp27mu-manylinux1_x86_64.whl
-rw-r--r-- 1 root root  30M Aug 28 07:36 scipy-1.1.0-cp27-cp27mu-manylinux1_x86_64.whl
-rw-r--r-- 1 root root 106K Aug 28 07:36 simplejson-3.8.2-cp27-cp27mu-linux_x86_64.whl
-rw-r--r-- 1 root root  11K Aug 28 07:36 six-1.11.0-py2.py3-none-any.whl
-rw-r--r-- 1 root root 109K Aug 28 07:36 splunk_sdk-1.5.0-py2-none-any.whl
-rw-r--r-- 1 root root 462K Aug 28 07:36 uWSGI-2.0.17.1-cp27-cp27mu-linux_x86_64.whl
-rw-r--r-- 1 root root  60K Aug 28 07:36 ujson-1.34-cp27-cp27mu-linux_x86_64.whl
-rw-r--r-- 1 root root 131K Aug 28 07:36 urllib3-1.23-py2.py3-none-any.whl

Why it fails to find the files?

Here is the error

Ignoring indexes: https://pypi.python.org/simple/
Downloading/unpacking uwsgi
  Could not find any downloads that satisfy the requirement uwsgi
Cleaning up...
No distributions at all found for uwsgi
Storing debug log for failure in /root/.pip/pip.log

In case it makes any difference these commands RUN from within a Dockerfile.