diff --git a/pkgs/development/python-modules/buildbot/default.nix b/pkgs/development/python-modules/buildbot/default.nix
index 011cd879b1f3..cd98a8da710a 100644
--- a/pkgs/development/python-modules/buildbot/default.nix
+++ b/pkgs/development/python-modules/buildbot/default.nix
@@ -1,8 +1,8 @@
 { stdenv, lib, buildPythonPackage, fetchPypi, makeWrapper, isPy3k,
   python, twisted, jinja2, zope_interface, future, sqlalchemy,
-  sqlalchemy_migrate, dateutil, txaio, autobahn, pyjwt, treq, txrequests,
-  txgithub, pyjade, boto3, moto, mock, python-lz4, setuptoolsTrial, isort, pylint,
-  flake8, buildbot-worker, buildbot-pkg, glibcLocales }:
+  sqlalchemy_migrate, dateutil, txaio, autobahn, pyjwt, pyyaml, treq,
+  txrequests, txgithub, pyjade, boto3, moto, mock, python-lz4, setuptoolsTrial,
+  isort, pylint, flake8, buildbot-worker, buildbot-pkg, glibcLocales }:
 
 let
   withPlugins = plugins: buildPythonPackage {
@@ -24,11 +24,11 @@ let
 
   package = buildPythonPackage rec {
     pname = "buildbot";
-    version = "1.5.0";
+    version = "1.8.1";
 
     src = fetchPypi {
       inherit pname version;
-      sha256 = "d02a717222bcdc98205624c7d6b0b2ae24653170f2971946f26bf8cadea4fd52";
+      sha256 = "1zadmyrlk7p9h1akmbzwa7p90s7jwsxvdx4xn9i54dnda450m3a7";
     };
 
     propagatedBuildInputs = [
@@ -43,6 +43,7 @@ let
       txaio
       autobahn
       pyjwt
+      pyyaml
 
       # tls
       twisted.extras.tls
@@ -71,13 +72,16 @@ let
       ./skip_test_linux_distro.patch
     ];
 
-    LC_ALL = "en_US.UTF-8";
+    postPatch = ''
+      substituteInPlace buildbot/scripts/logwatcher.py --replace '/usr/bin/tail' "$(type -P tail)"
+    '';
 
     # TimeoutErrors on slow machines -> aarch64
     doCheck = !stdenv.isAarch64;
 
-    postPatch = ''
-      substituteInPlace buildbot/scripts/logwatcher.py --replace '/usr/bin/tail' "$(type -P tail)"
+    preCheck = ''
+      export LC_ALL="en_US.UTF-8"
+      export PATH="$out/bin:$PATH"
     '';
 
     passthru = {
diff --git a/pkgs/development/python-modules/buildbot/pkg.nix b/pkgs/development/python-modules/buildbot/pkg.nix
index b9358b1c420b..480bed2805ee 100644
--- a/pkgs/development/python-modules/buildbot/pkg.nix
+++ b/pkgs/development/python-modules/buildbot/pkg.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage rec {
   pname = "buildbot-pkg";
-  version = "1.4.0";
+  version = "1.8.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "06f4jvczbg9km0gfmcd1ljplf5w8za27i9ap9jnyqgh3j77smd7a";
+    sha256 = "16gjdzkris6475bvsgvb0v6rkn4xb6f55s468q37n0l1r6n8snc3";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/buildbot/plugins.nix b/pkgs/development/python-modules/buildbot/plugins.nix
index bdc67d178d44..4bcaa965d2f3 100644
--- a/pkgs/development/python-modules/buildbot/plugins.nix
+++ b/pkgs/development/python-modules/buildbot/plugins.nix
@@ -10,7 +10,7 @@
 
     src = fetchPypi {
       inherit pname version format;
-      sha256 = "1m5dsp1gn9m5vfh5hnqp8g6hmhw1f1ydnassd33nhk521f2akz0v";
+      sha256 = "03cgjhwpgbm0qgis1cdy9g4vc11hsrya9grcx4j35784rny7lbfl";
     };
 
     meta = with lib; {
@@ -27,7 +27,7 @@
 
     src = fetchPypi {
       inherit pname version;
-      sha256 = "0vblaxmihgb4w9aa5q0wcgvxs7qzajql8s22w0pl9qs494g05s9r";
+      sha256 = "0pfp2n4ys99jglshdrp2f6jm73c4ym3dfwl6qjvbc7y7nsi74824";
     };
 
     propagatedBuildInputs = [ buildbot-pkg ];
@@ -47,7 +47,7 @@
 
     src = fetchPypi {
       inherit pname version;
-      sha256 = "18v1a6dapwjc2s9hi0cv3ry3s048w84md908zwaa3033gz3zwzy7";
+      sha256 = "0gnxq9niw64q36dm917lhhcl8zp0wjwaamjp07zidnrb5c3pjbsz";
     };
 
     propagatedBuildInputs = [ buildbot-pkg ];
@@ -67,7 +67,7 @@
 
     src = fetchPypi {
       inherit pname version;
-      sha256 = "0iawsy892v6rn88hsgiiwaf689jqzhnb2wbxh6zkz3c0hvq4g0qd";
+      sha256 = "1b06aa8m1pzqq2d8imrq5mazc7llrlbgm7jzi8h6jjd2gahdjgz5";
     };
 
     propagatedBuildInputs = [ buildbot-pkg ];
@@ -87,7 +87,7 @@
 
     src = fetchPypi {
       inherit pname version;
-      sha256 = "00cpjna3bffh1qbq6a3sqffd1g7qhbrmn9gpzxf9k38jam6jgfpz";
+      sha256 = "1v8411bw0cs206vwfnqx1na7dzg77h9aff4wlm11hkbdsy9ayv2d";
     };
 
     propagatedBuildInputs = [ buildbot-pkg ];
diff --git a/pkgs/development/python-modules/buildbot/worker.nix b/pkgs/development/python-modules/buildbot/worker.nix
index 4e54276f8aed..8e49d085fbd1 100644
--- a/pkgs/development/python-modules/buildbot/worker.nix
+++ b/pkgs/development/python-modules/buildbot/worker.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage (rec {
   pname = "buildbot-worker";
-  version = "1.4.0";
+  version = "1.8.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "12zvf4c39b6s4g1f2w407q8kkw602m88rc1ggi4w9pkw3bwbxrgy";
+    sha256 = "1rh73jbyms4b9wgkkdzcn80xfd18p8rn89rw4rsi2002ydrc7n39";
   };
 
   propagatedBuildInputs = [ twisted future ];
diff --git a/pkgs/development/python-modules/sqlalchemy-migrate/default.nix b/pkgs/development/python-modules/sqlalchemy-migrate/default.nix
index 41269aa6567f..9daf2a696c25 100644
--- a/pkgs/development/python-modules/sqlalchemy-migrate/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-migrate/default.nix
@@ -5,11 +5,11 @@
 }:
 buildPythonPackage rec {
   pname = "sqlalchemy-migrate";
-  version = "0.11.0";
+  version = "0.12.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0ld2bihp9kmf57ykgzrfgxs4j9kxlw79sgdj9sfn47snw3izb2p6";
+    sha256 = "1bngmbcry97kwhrxwm0d74zg9qg7gmiws6rd78xshyfgpcqdmylc";
   };
 
   # See: https://review.openstack.org/#/c/608382/