diff --git a/pkgs/applications/misc/khal/default.nix b/pkgs/applications/misc/khal/default.nix
index da0c8c38e73..52edb44efe9 100644
--- a/pkgs/applications/misc/khal/default.nix
+++ b/pkgs/applications/misc/khal/default.nix
@@ -2,18 +2,19 @@
 
 with python3.pkgs; buildPythonApplication rec {
   pname = "khal";
-  version = "0.9.10";
+  version = "0.10.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "03h0j0d3xyqh98x5v2gv63wv3g91hip3vsaxvybsn5iz331d23h4";
+    sha256 = "1p49f3g25x900vk32spjbr2aipj12kcbhayny2vwhdpkjlv6k396";
   };
 
-  LC_ALL = "en_US.UTF-8";
+  LC_ALL = "C.UTF-8";
 
   propagatedBuildInputs = [
     atomicwrites
     click
+    click-log
     configobj
     dateutil
     icalendar
@@ -27,15 +28,14 @@ with python3.pkgs; buildPythonApplication rec {
     pkginfo
     freezegun
   ];
-  nativeBuildInputs = [ setuptools_scm pkgs.glibcLocales ];
+  nativeBuildInputs = [ setuptools_scm ];
   checkInputs = [ pytest ];
 
   postInstall = ''
     install -D misc/__khal $out/share/zsh/site-functions/__khal
   '';
 
-  # One test fails as of 0.9.10 due to the upgrade to icalendar 4.0.3
-  doCheck = false;
+  doCheck = true;
 
   checkPhase = ''
     py.test