diff --git a/pkgs/python-packages.nix b/pkgs/python-packages.nix
--- a/pkgs/python-packages.nix
+++ b/pkgs/python-packages.nix
@@ -1759,7 +1759,6 @@ self: super: {
       self."beaker"
       self."bleach"
       self."celery"
-      self."chameleon"
       self."channelstream"
       self."click"
       self."colander"
@@ -1770,7 +1769,6 @@ self: super: {
       self."docutils"
       self."dogpile.cache"
       self."dogpile.core"
-      self."ecdsa"
       self."formencode"
       self."future"
       self."futures"
@@ -1797,7 +1795,6 @@ self: super: {
       self."pyparsing"
       self."pyramid-beaker"
       self."pyramid-debugtoolbar"
-      self."pyramid-jinja2"
       self."pyramid-mako"
       self."pyramid"
       self."pyramid-mailer"
@@ -1820,7 +1817,6 @@ self: super: {
       self."sshpubkeys"
       self."subprocess32"
       self."supervisor"
-      self."tempita"
       self."translationstring"
       self."urllib3"
       self."urlobject"
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,6 @@ babel==1.3
 beaker==1.9.1
 bleach==3.1.0
 celery==4.1.1
-chameleon==2.24
 channelstream==0.5.2
 click==7.0
 colander==1.7.0
@@ -21,7 +20,6 @@ deform==2.0.7
 docutils==0.14.0
 dogpile.cache==0.7.1
 dogpile.core==0.4.1
-ecdsa==0.13
 formencode==1.2.4
 future==0.14.3
 futures==3.0.2
@@ -48,7 +46,6 @@ pygments==2.3.1
 pyparsing==2.3.0
 pyramid-beaker==0.8
 pyramid-debugtoolbar==4.5.0
-pyramid-jinja2==2.7
 pyramid-mako==1.0.2
 pyramid==1.10.1
 pyramid_mailer==0.15.1
@@ -71,7 +68,6 @@ sqlalchemy==1.1.18
 sshpubkeys==3.1.0
 subprocess32==3.5.3
 supervisor==3.3.5
-tempita==0.5.2
 translationstring==1.3
 urllib3==1.24.1
 urlobject==2.4.3
diff --git a/requirements_pinned.txt b/requirements_pinned.txt
--- a/requirements_pinned.txt
+++ b/requirements_pinned.txt
@@ -3,9 +3,15 @@
 atomicwrites==1.2.1
 attrs==18.2.0
 billiard==3.5.0.3
+chameleon==2.24
+cffi==1.12.2
+ecdsa==0.13
+hupper==1.6
 gnureadline==6.3.8
 jinja2==2.9.6
 jsonschema==2.6.0
 pathlib2==2.3.3
+pyramid-jinja2==2.7
 setproctitle==1.1.10
-
+scandir==1.10.0
+tempita==0.5.2