diff --git a/pkgs/applications/misc/cura/default.nix b/pkgs/applications/misc/cura/default.nix
index b9a160564a5d..7f449ed49393 100644
--- a/pkgs/applications/misc/cura/default.nix
+++ b/pkgs/applications/misc/cura/default.nix
@@ -28,7 +28,7 @@ mkDerivation rec {
 
   meta = with lib; {
     description = "3D printer / slicing GUI built on top of the Uranium framework";
-    homepage = "https://github.com/Ultimaker/Cura";
+    homepage = https://github.com/Ultimaker/Cura;
     license = licenses.agpl3;
     platforms = platforms.linux;
     maintainers = with maintainers; [ abbradar ];
diff --git a/pkgs/applications/misc/curaengine/default.nix b/pkgs/applications/misc/curaengine/default.nix
index 575889ad2c6f..7f3b4fc7925d 100644
--- a/pkgs/applications/misc/curaengine/default.nix
+++ b/pkgs/applications/misc/curaengine/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A powerful, fast and robust engine for processing 3D models into 3D printing instruction";
-    homepage = "https://github.com/Ultimaker/CuraEngine";
+    homepage = https://github.com/Ultimaker/CuraEngine;
     license = licenses.agpl3;
     platforms = platforms.linux;
     maintainers = with maintainers; [ abbradar ];
diff --git a/pkgs/applications/science/math/cntk/default.nix b/pkgs/applications/science/math/cntk/default.nix
index bef695fc650a..bb78fbe23551 100644
--- a/pkgs/applications/science/math/cntk/default.nix
+++ b/pkgs/applications/science/math/cntk/default.nix
@@ -91,7 +91,7 @@ in stdenv.mkDerivation rec {
   enableParallelBuilding = false;
 
   meta = with lib; {
-    homepage = "https://github.com/Microsoft/CNTK";
+    homepage = https://github.com/Microsoft/CNTK;
     description = "An open source deep-learning toolkit";
     license = if onebitSGDSupport then licenses.unfreeRedistributable else licenses.mit;
     maintainers = with maintainers; [ abbradar ];
diff --git a/pkgs/applications/science/math/mxnet/default.nix b/pkgs/applications/science/math/mxnet/default.nix
index d2f3d0c5f337..3c22287c8e84 100644
--- a/pkgs/applications/science/math/mxnet/default.nix
+++ b/pkgs/applications/science/math/mxnet/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Lightweight, Portable, Flexible Distributed/Mobile Deep Learning with Dynamic, Mutation-aware Dataflow Dep Scheduler";
-    homepage = "https://mxnet.incubator.apache.org/";
+    homepage = https://mxnet.incubator.apache.org/;
     maintainers = with maintainers; [ abbradar ];
     license = licenses.asl20;
     platforms = platforms.linux;
diff --git a/pkgs/development/python-modules/hmmlearn/default.nix b/pkgs/development/python-modules/hmmlearn/default.nix
index 3295786bd08c..e0294c2afca4 100644
--- a/pkgs/development/python-modules/hmmlearn/default.nix
+++ b/pkgs/development/python-modules/hmmlearn/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Hidden Markov Models in Python with scikit-learn like API";
-    homepage    = "https://github.com/hmmlearn/hmmlearn";
+    homepage    = https://github.com/hmmlearn/hmmlearn;
     license     = licenses.bsd3;
     maintainers = with maintainers; [ abbradar ];
     platforms   = platforms.unix;
diff --git a/pkgs/development/python-modules/plyfile/default.nix b/pkgs/development/python-modules/plyfile/default.nix
index 410a633c46b0..bfe5d2f202df 100644
--- a/pkgs/development/python-modules/plyfile/default.nix
+++ b/pkgs/development/python-modules/plyfile/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "NumPy-based text/binary PLY file reader/writer for Python";
-    homepage    = "https://github.com/dranjan/python-plyfile";
+    homepage    = https://github.com/dranjan/python-plyfile;
     maintainers = with maintainers; [ abbradar ];
   };
 
diff --git a/pkgs/development/python-modules/pychromecast/default.nix b/pkgs/development/python-modules/pychromecast/default.nix
index 46d3272807eb..0b41b6ef0b10 100644
--- a/pkgs/development/python-modules/pychromecast/default.nix
+++ b/pkgs/development/python-modules/pychromecast/default.nix
@@ -2,19 +2,19 @@
 
 buildPythonPackage rec {
   pname = "PyChromecast";
-  version = "1.0.3";
+  version = "2.0.0";
   name = pname + "-" + version;
 
   src = fetchurl {
     url    = "mirror://pypi/p/pychromecast/${name}.tar.gz";
-    sha256 = "714a9e03e6a258081e3b6296ed15592e015facbe38bbe60819cca6f04c599f25";
+    sha256 = "1cp1ssfb8zk4sz74nsnf72b7dd5fzkwc4qdgc7rq8nfr4v611w6c";
   };
 
   propagatedBuildInputs = [ requests six zeroconf protobuf ];
 
   meta = with lib; {
     description = "Library for Python 2 and 3 to communicate with the Google Chromecast";
-    homepage    = "https://github.com/balloob/pychromecast";
+    homepage    = https://github.com/balloob/pychromecast;
     license     = licenses.mit;
     maintainers = with maintainers; [ abbradar ];
     platforms   = platforms.linux;
diff --git a/pkgs/development/python-modules/regex/default.nix b/pkgs/development/python-modules/regex/default.nix
index 65de08382239..44650618f5f5 100644
--- a/pkgs/development/python-modules/regex/default.nix
+++ b/pkgs/development/python-modules/regex/default.nix
@@ -15,9 +15,9 @@ buildPythonPackage rec {
 
   meta = {
     description = "Alternative regular expression module, to replace re";
-    homepage = "https://bitbucket.org/mrabarnett/mrab-regex";
+    homepage = https://bitbucket.org/mrabarnett/mrab-regex;
     license = lib.licenses.psfl;
     platforms = lib.platforms.linux;
     maintainers = with lib.maintainers; [ abbradar ];
   };
-}
\ No newline at end of file
+}
diff --git a/pkgs/development/python-modules/sphfile/default.nix b/pkgs/development/python-modules/sphfile/default.nix
index 189fa7c932da..8ee4ce76069f 100644
--- a/pkgs/development/python-modules/sphfile/default.nix
+++ b/pkgs/development/python-modules/sphfile/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Numpy-based NIST SPH audio-file reader";
-    homepage    = "https://github.com/mcfletch/sphfile";
+    homepage    = https://github.com/mcfletch/sphfile;
     license     = licenses.mit;
     maintainers = with maintainers; [ abbradar ];
     platforms   = platforms.unix;
diff --git a/pkgs/development/python-modules/uranium/default.nix b/pkgs/development/python-modules/uranium/default.nix
index 24eecf82311a..dfabe959300d 100644
--- a/pkgs/development/python-modules/uranium/default.nix
+++ b/pkgs/development/python-modules/uranium/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A Python framework for building Desktop applications";
-    homepage = "https://github.com/Ultimaker/Uranium";
+    homepage = https://github.com/Ultimaker/Uranium;
     license = licenses.agpl3;
     platforms = platforms.linux;
     maintainers = with maintainers; [ abbradar ];
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 4beb076667cc..fb5b46fa6600 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -11035,7 +11035,7 @@ let self = _self // overrides; _self = with self; {
     # tests fail; look unfinished
     doCheck = false;
     meta = {
-      homepage = "http://ludovic.rousseau.free.fr/softwares/pcsc-perl/";
+      homepage = http://ludovic.rousseau.free.fr/softwares/pcsc-perl/;
       description = "Communicate with a smart card using PC/SC";
       license = stdenv.lib.licenses.gpl2Plus;
       maintainers = with maintainers; [ abbradar ];