diff --git a/pkgs/applications/audio/tuijam/default.nix b/pkgs/applications/audio/tuijam/default.nix
index 4a215528b7cd..d9b9012521cb 100644
--- a/pkgs/applications/audio/tuijam/default.nix
+++ b/pkgs/applications/audio/tuijam/default.nix
@@ -22,7 +22,7 @@ buildPythonApplication rec {
 
   propagatedBuildInputs = with python3Packages; [
     gmusicapi
-    google_api_python_client
+    google-api-python-client
     mpv
     pydbus
     pygobject3
diff --git a/pkgs/applications/misc/gcalcli/default.nix b/pkgs/applications/misc/gcalcli/default.nix
index 20aefe2ab1d6..e19e89ec6c0b 100644
--- a/pkgs/applications/misc/gcalcli/default.nix
+++ b/pkgs/applications/misc/gcalcli/default.nix
@@ -21,7 +21,7 @@ buildPythonApplication rec {
 
   propagatedBuildInputs = [
     dateutil gflags httplib2 parsedatetime six vobject
-    google_api_python_client oauth2client uritemplate
+    google-api-python-client oauth2client uritemplate
     libnotify
   ] ++ lib.optional (!isPy3k) futures;
 
diff --git a/pkgs/applications/networking/instant-messengers/blink/default.nix b/pkgs/applications/networking/instant-messengers/blink/default.nix
index 7ed3b1673831..3ee835610f79 100644
--- a/pkgs/applications/networking/instant-messengers/blink/default.nix
+++ b/pkgs/applications/networking/instant-messengers/blink/default.nix
@@ -22,7 +22,7 @@ mkDerivationWith pythonPackages.buildPythonApplication rec {
     cjson
     sipsimple
     twisted
-    google_api_python_client
+    google-api-python-client
   ];
 
   buildInputs = [
diff --git a/pkgs/applications/networking/lieer/default.nix b/pkgs/applications/networking/lieer/default.nix
index 3ad2762a2cfc..420b9b28ccfc 100644
--- a/pkgs/applications/networking/lieer/default.nix
+++ b/pkgs/applications/networking/lieer/default.nix
@@ -14,7 +14,7 @@ python3Packages.buildPythonApplication rec {
   propagatedBuildInputs = with python3Packages; [
     notmuch
     oauth2client
-    google_api_python_client
+    google-api-python-client
     tqdm
     setuptools
   ];
diff --git a/pkgs/development/python-modules/beancount/default.nix b/pkgs/development/python-modules/beancount/default.nix
index 29d676ad62a1..2c4f495a7fff 100644
--- a/pkgs/development/python-modules/beancount/default.nix
+++ b/pkgs/development/python-modules/beancount/default.nix
@@ -6,7 +6,7 @@
 , bottle
 , chardet
 , dateutil
-, google_api_python_client
+, google-api-python-client
 , lxml
 , oauth2client
 , ply
@@ -34,7 +34,7 @@ buildPythonPackage rec {
     bottle
     chardet
     dateutil
-    google_api_python_client
+    google-api-python-client
     lxml
     oauth2client
     ply
diff --git a/pkgs/development/python-modules/gdrivefs/default.nix b/pkgs/development/python-modules/gdrivefs/default.nix
index 6060dc3a5bb8..836fdee4bebd 100644
--- a/pkgs/development/python-modules/gdrivefs/default.nix
+++ b/pkgs/development/python-modules/gdrivefs/default.nix
@@ -8,7 +8,7 @@
 , six
 , dateutil
 , fusepy
-, google_api_python_client
+, google-api-python-client
 }:
 
 buildPythonPackage rec {
@@ -22,7 +22,7 @@ buildPythonPackage rec {
   };
 
   buildInputs = [ gipc greenlet httplib2 six ];
-  propagatedBuildInputs = [ dateutil fusepy google_api_python_client ];
+  propagatedBuildInputs = [ dateutil fusepy google-api-python-client ];
 
   patchPhase = ''
     substituteInPlace gdrivefs/resources/requirements.txt \
diff --git a/pkgs/development/python-modules/goobook/default.nix b/pkgs/development/python-modules/goobook/default.nix
index 83175b6c86a5..42e2b84783f5 100644
--- a/pkgs/development/python-modules/goobook/default.nix
+++ b/pkgs/development/python-modules/goobook/default.nix
@@ -1,6 +1,6 @@
 { lib, buildPythonPackage, fetchPypi, isPy3k
 , docutils, installShellFiles
-, google_api_python_client, simplejson, oauth2client, setuptools, xdg
+, google-api-python-client, simplejson, oauth2client, setuptools, xdg
 }:
 
 buildPythonPackage rec {
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ docutils installShellFiles ];
   propagatedBuildInputs = [
-    google_api_python_client simplejson oauth2client setuptools xdg
+    google-api-python-client simplejson oauth2client setuptools xdg
   ];
 
   postInstall = ''
diff --git a/pkgs/development/python-modules/oauthenticator/default.nix b/pkgs/development/python-modules/oauthenticator/default.nix
index 234c4edd1ae7..839582e87f0d 100644
--- a/pkgs/development/python-modules/oauthenticator/default.nix
+++ b/pkgs/development/python-modules/oauthenticator/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
-, google_api_python_client
+, google-api-python-client
 , google-auth-oauthlib
 , jupyterhub
 , mwoauth
@@ -29,7 +29,7 @@ buildPythonPackage rec {
   pytestFlagsArray = [ "oauthenticator/tests" ];
 
   checkInputs = [
-    google_api_python_client
+    google-api-python-client
     google-auth-oauthlib
     mwoauth
     pyjwt
diff --git a/pkgs/development/python-modules/pydrive/default.nix b/pkgs/development/python-modules/pydrive/default.nix
index aa0515323e29..5d1fc187c9f5 100644
--- a/pkgs/development/python-modules/pydrive/default.nix
+++ b/pkgs/development/python-modules/pydrive/default.nix
@@ -1,7 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, google_api_python_client
+, google-api-python-client
 , oauth2client
 , pyyaml
 }:
@@ -17,7 +17,7 @@ buildPythonPackage rec {
   };
 
   propagatedBuildInputs = [
-    google_api_python_client
+    google-api-python-client
     oauth2client
     pyyaml
   ];
diff --git a/pkgs/development/python-modules/weboob/default.nix b/pkgs/development/python-modules/weboob/default.nix
index 7c3d25068e30..861cb38389a8 100644
--- a/pkgs/development/python-modules/weboob/default.nix
+++ b/pkgs/development/python-modules/weboob/default.nix
@@ -6,7 +6,7 @@
 , futures
 , gdata
 , gnupg
-, google_api_python_client
+, google-api-python-client
 , html2text
 , libyaml
 , lxml
@@ -56,7 +56,7 @@ buildPythonPackage rec {
     feedparser
     gdata
     gnupg
-    google_api_python_client
+    google-api-python-client
     html2text
     libyaml
     lxml
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index bc9768a7345c..acd274ab07eb 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -309,7 +309,7 @@
     "goalfeed" = ps: with ps; [ ]; # missing inputs: pysher
     "goalzero" = ps: with ps; [ ]; # missing inputs: goalzero
     "gogogate2" = ps: with ps; [ ]; # missing inputs: gogogate2-api
-    "google" = ps: with ps; [ google_api_python_client httplib2 oauth2client ];
+    "google" = ps: with ps; [ google-api-python-client httplib2 oauth2client ];
     "google_assistant" = ps: with ps; [ aiohttp-cors ];
     "google_cloud" = ps: with ps; [ google-cloud-texttospeech ];
     "google_domains" = ps: with ps; [ ];
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index d3dacdf42857..a8abeee52a59 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2655,12 +2655,12 @@ in {
 
   google-api-core = callPackage ../development/python-modules/google-api-core { };
 
-  google_api_python_client =
-    let google_api_python_client = callPackage ../development/python-modules/google-api-python-client { };
+  google-api-python-client =
+    let google-api-python-client = callPackage ../development/python-modules/google-api-python-client { };
     in if isPy3k then
-      google_api_python_client
+      google-api-python-client
     else # Python 2.7 support was deprecated but is still needed by weboob and duplicity
-      google_api_python_client.overridePythonAttrs (old: rec {
+      google-api-python-client.overridePythonAttrs (old: rec {
         version = "1.7.6";
         src = old.src.override {
           inherit version;