diff --git a/pkgs/applications/audio/AMB-plugins/default.nix b/pkgs/applications/audio/AMB-plugins/default.nix
index 2e2af8f3a9a2..eac2b4c783b4 100644
--- a/pkgs/applications/audio/AMB-plugins/default.nix
+++ b/pkgs/applications/audio/AMB-plugins/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   preInstall="mkdir -p $out/lib/ladspa";
 
   meta = {
-    description = ''A set of ambisonics ladspa plugins'';
+    description = "A set of ambisonics ladspa plugins";
     longDescription = ''
       Mono and stereo to B-format panning, horizontal rotator, square, hexagon and cube decoders.
     '';
diff --git a/pkgs/applications/audio/FIL-plugins/default.nix b/pkgs/applications/audio/FIL-plugins/default.nix
index 253e724cd313..89bda1387d93 100644
--- a/pkgs/applications/audio/FIL-plugins/default.nix
+++ b/pkgs/applications/audio/FIL-plugins/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   preInstall="mkdir -p $out/lib/ladspa";
 
   meta = {
-    description = ''a four-band parametric equaliser, which has the nice property of being stable even while parameters are being changed'';
+    description = "a four-band parametric equaliser, which has the nice property of being stable even while parameters are being changed";
     longDescription = ''
       Each section has an active/bypass switch, frequency, bandwidth and gain controls.
       There is also a global bypass switch and gain control.
diff --git a/pkgs/applications/audio/mi2ly/default.nix b/pkgs/applications/audio/mi2ly/default.nix
index 58c1690a9bb0..bc74a73b6432 100644
--- a/pkgs/applications/audio/mi2ly/default.nix
+++ b/pkgs/applications/audio/mi2ly/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
 
   meta = {
     inherit (s) version;
-    description = ''MIDI to Lilypond converter'';
+    description = "MIDI to Lilypond converter";
     license = stdenv.lib.licenses.gpl2Plus ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/graphics/rapcad/default.nix b/pkgs/applications/graphics/rapcad/default.nix
index e86436cd06f2..904c9f8f4025 100644
--- a/pkgs/applications/graphics/rapcad/default.nix
+++ b/pkgs/applications/graphics/rapcad/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3;
     maintainers = [ maintainers.raskin ];
     platforms = platforms.linux;
-    description = ''Constructive solid geometry package'';
+    description = "Constructive solid geometry package";
     broken = true; # 2018-04-11
   };
 }
diff --git a/pkgs/applications/misc/slmenu/default.nix b/pkgs/applications/misc/slmenu/default.nix
index 122006647cb1..16145a915feb 100644
--- a/pkgs/applications/misc/slmenu/default.nix
+++ b/pkgs/applications/misc/slmenu/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
   makeFlags = [ "PREFIX=$(out)" ];
   meta = {
     inherit (s) version;
-    description = ''A console dmenu-like tool'';
+    description = "A console dmenu-like tool";
     license = lib.licenses.mit;
     maintainers = [lib.maintainers.raskin];
     platforms = lib.platforms.linux;
diff --git a/pkgs/applications/misc/vifm/default.nix b/pkgs/applications/misc/vifm/default.nix
index 64f0f6b7f5f7..4cf13c9c7aac 100644
--- a/pkgs/applications/misc/vifm/default.nix
+++ b/pkgs/applications/misc/vifm/default.nix
@@ -32,7 +32,7 @@ in stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    description = ''A vi-like file manager${if isFullPackage then "; Includes support for optional features" else ""}'';
+    description = "A vi-like file manager${if isFullPackage then "; Includes support for optional features" else ""}";
     maintainers = with maintainers; [ raskin ];
     platforms = if mediaSupport then platforms.linux else platforms.unix;
     license = licenses.gpl2;
diff --git a/pkgs/data/fonts/tempora-lgc/default.nix b/pkgs/data/fonts/tempora-lgc/default.nix
index c7be70f800de..6bcceff16d22 100644
--- a/pkgs/data/fonts/tempora-lgc/default.nix
+++ b/pkgs/data/fonts/tempora-lgc/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation {
   outputHash = "1kwj31cjgdirqvh6bxs4fnvvr1ppaz6z8w40kvhkivgs69jglmzw";
 
   meta = {
-    description = ''Tempora font'';
+    description = "Tempora font";
     license = lib.licenses.gpl2 ;
     maintainers = [lib.maintainers.raskin];
   };
diff --git a/pkgs/data/fonts/unscii/default.nix b/pkgs/data/fonts/unscii/default.nix
index 5aaa68f9796f..066a4d4d9221 100644
--- a/pkgs/data/fonts/unscii/default.nix
+++ b/pkgs/data/fonts/unscii/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     inherit version;
-    description = ''Bitmapped character-art-friendly Unicode fonts'';
+    description = "Bitmapped character-art-friendly Unicode fonts";
     # Basically GPL2+ with font exception — because of the Unifont-augmented
     # version. The reduced version is public domain.
     license = "http://unifoundry.com/LICENSE.txt";
diff --git a/pkgs/development/beam-modules/pc/default.nix b/pkgs/development/beam-modules/pc/default.nix
index d30b0fbdbd28..fac3b2988354 100644
--- a/pkgs/development/beam-modules/pc/default.nix
+++ b/pkgs/development/beam-modules/pc/default.nix
@@ -6,7 +6,7 @@ buildHex {
   sha256 = "0xq411ig5ny3iilkkkqa4vm3w3dgjc9cfzkqwk8pm13dw9mcm8h0";
 
   meta = {
-    description = ''a rebar3 port compiler for native code'';
+    description = "a rebar3 port compiler for native code";
     license = stdenv.lib.licenses.mit;
     homepage = "https://github.com/blt/port_compiler";
   };
diff --git a/pkgs/development/compilers/abcl/default.nix b/pkgs/development/compilers/abcl/default.nix
index 22f6ca7a0dd2..aa537169aaf8 100644
--- a/pkgs/development/compilers/abcl/default.nix
+++ b/pkgs/development/compilers/abcl/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   buildInputs = [jre ant jdk jre];
   meta = {
     inherit version;
-    description = ''A JVM-based Common Lisp implementation'';
+    description = "A JVM-based Common Lisp implementation";
     license = stdenv.lib.licenses.gpl3 ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/compilers/clasp/default.nix b/pkgs/development/compilers/clasp/default.nix
index 664d84921135..b7da76d38f99 100644
--- a/pkgs/development/compilers/clasp/default.nix
+++ b/pkgs/development/compilers/clasp/default.nix
@@ -119,7 +119,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     inherit version;
-    description = ''A Common Lisp implementation based on LLVM with C++ integration'';
+    description = "A Common Lisp implementation based on LLVM with C++ integration";
     license = stdenv.lib.licenses.lgpl21Plus ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/compilers/obliv-c/default.nix b/pkgs/development/compilers/obliv-c/default.nix
index 8fd6f33740e4..cdd0cf375bc8 100644
--- a/pkgs/development/compilers/obliv-c/default.nix
+++ b/pkgs/development/compilers/obliv-c/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     inherit version;
-    description = ''A GCC wrapper that makes it easy to embed secure computation protocols inside regular C programs'';
+    description = "A GCC wrapper that makes it easy to embed secure computation protocols inside regular C programs";
     license = stdenv.lib.licenses.bsd3;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/interpreters/icon-lang/default.nix b/pkgs/development/interpreters/icon-lang/default.nix
index 02992e718718..30e260eee465 100644
--- a/pkgs/development/interpreters/icon-lang/default.nix
+++ b/pkgs/development/interpreters/icon-lang/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = ''A very high level general-purpose programming language'';
+    description = "A very high level general-purpose programming language";
     maintainers = with maintainers; [ vrthra yurrriq ];
     platforms = with platforms; linux ++ darwin ++ freebsd ++ netbsd ++ openbsd ++ cygwin ++ illumos;
     license = licenses.publicDomain;
diff --git a/pkgs/development/interpreters/rebol/default.nix b/pkgs/development/interpreters/rebol/default.nix
index b26af7f0b1b7..4206e1e1604d 100644
--- a/pkgs/development/interpreters/rebol/default.nix
+++ b/pkgs/development/interpreters/rebol/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = ''Relative expression based object language, a language where code is data'';
+    description = "Relative expression based object language, a language where code is data";
     maintainers = with maintainers; [ vrthra ];
     platforms = [ "x86_64-linux" ];
     license = licenses.asl20;
diff --git a/pkgs/development/interpreters/unicon-lang/default.nix b/pkgs/development/interpreters/unicon-lang/default.nix
index 9bdd31f400a8..4889a21ddfd4 100644
--- a/pkgs/development/interpreters/unicon-lang/default.nix
+++ b/pkgs/development/interpreters/unicon-lang/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    description = ''A very high level, goal-directed, object-oriented, general purpose applications language'';
+    description = "A very high level, goal-directed, object-oriented, general purpose applications language";
     maintainers = with maintainers; [ vrthra ];
     platforms = platforms.linux;
     license = licenses.gpl2;
diff --git a/pkgs/development/libraries/arb/default.nix b/pkgs/development/libraries/arb/default.nix
index a9fb5de0bd9f..79a0df9a1035 100644
--- a/pkgs/development/libraries/arb/default.nix
+++ b/pkgs/development/libraries/arb/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
   meta = with stdenv.lib; {
     inherit version;
-    description = ''A library for arbitrary-precision interval arithmetic'';
+    description = "A library for arbitrary-precision interval arithmetic";
     homepage = "http://arblib.org/";
     license = stdenv.lib.licenses.lgpl21Plus;
     maintainers = teams.sage.members;
diff --git a/pkgs/development/libraries/cddlib/default.nix b/pkgs/development/libraries/cddlib/default.nix
index cebe6fb2bf6a..4b745a2a348c 100644
--- a/pkgs/development/libraries/cddlib/default.nix
+++ b/pkgs/development/libraries/cddlib/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
   meta = with stdenv.lib; {
     inherit version;
-    description = ''An implementation of the Double Description Method for generating all vertices of a convex polyhedron'';
+    description = "An implementation of the Double Description Method for generating all vertices of a convex polyhedron";
     license = licenses.gpl2Plus;
     maintainers = teams.sage.members;
     platforms = platforms.unix;
diff --git a/pkgs/development/libraries/dxflib/default.nix b/pkgs/development/libraries/dxflib/default.nix
index 1b63d8805fd9..f0f96273bea5 100644
--- a/pkgs/development/libraries/dxflib/default.nix
+++ b/pkgs/development/libraries/dxflib/default.nix
@@ -39,6 +39,6 @@ stdenv.mkDerivation rec {
   meta = {
     maintainers = with stdenv.lib.maintainers; [raskin];
     platforms = stdenv.lib.platforms.linux;
-    description = ''DXF file format library'';
+    description = "DXF file format library";
   };
 }
diff --git a/pkgs/development/libraries/eclib/default.nix b/pkgs/development/libraries/eclib/default.nix
index 9273fb7fd78e..278099b8ca72 100644
--- a/pkgs/development/libraries/eclib/default.nix
+++ b/pkgs/development/libraries/eclib/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
   meta = with stdenv.lib; {
     inherit version;
-    description = ''Elliptic curve tools'';
+    description = "Elliptic curve tools";
     homepage = "https://github.com/JohnCremona/eclib";
     license = licenses.gpl2Plus;
     maintainers = teams.sage.members;
diff --git a/pkgs/development/libraries/fflas-ffpack/default.nix b/pkgs/development/libraries/fflas-ffpack/default.nix
index faa8ed3c70e4..decea9bfb794 100644
--- a/pkgs/development/libraries/fflas-ffpack/default.nix
+++ b/pkgs/development/libraries/fflas-ffpack/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     inherit version;
-    description = ''Finite Field Linear Algebra Subroutines'';
+    description = "Finite Field Linear Algebra Subroutines";
     license = licenses.lgpl21Plus;
     maintainers = teams.sage.members;
     platforms = platforms.unix;
diff --git a/pkgs/development/libraries/flint/default.nix b/pkgs/development/libraries/flint/default.nix
index 3c768fc472c7..96c536984013 100644
--- a/pkgs/development/libraries/flint/default.nix
+++ b/pkgs/development/libraries/flint/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
   meta = {
     inherit version;
-    description = ''Fast Library for Number Theory'';
+    description = "Fast Library for Number Theory";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/development/libraries/fplll/20160331.nix b/pkgs/development/libraries/fplll/20160331.nix
index aabbfd14a78b..05a6a30a6ec6 100644
--- a/pkgs/development/libraries/fplll/20160331.nix
+++ b/pkgs/development/libraries/fplll/20160331.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   buildInputs = [gmp mpfr];
   meta = {
     inherit version;
-    description = ''Lattice algorithms using floating-point arithmetic'';
+    description = "Lattice algorithms using floating-point arithmetic";
     license = stdenv.lib.licenses.lgpl21Plus;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/libraries/fplll/default.nix b/pkgs/development/libraries/fplll/default.nix
index 82d56ea2af41..e15479bafcfa 100644
--- a/pkgs/development/libraries/fplll/default.nix
+++ b/pkgs/development/libraries/fplll/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with stdenv.lib; {
-    description = ''Lattice algorithms using floating-point arithmetic'';
+    description = "Lattice algorithms using floating-point arithmetic";
     changelog = [
       # Some release notes are added to the github tags, though they are not
       # always complete.
diff --git a/pkgs/development/libraries/gf2x/default.nix b/pkgs/development/libraries/gf2x/default.nix
index 14ea3021914a..3440697989ee 100644
--- a/pkgs/development/libraries/gf2x/default.nix
+++ b/pkgs/development/libraries/gf2x/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with lib; {
-    description = ''Routines for fast arithmetic in GF(2)[x]'';
+    description = "Routines for fast arithmetic in GF(2)[x]";
     homepage = "http://gf2x.gforge.inria.fr";
     license = licenses.gpl2Plus;
     maintainers = teams.sage.members;
diff --git a/pkgs/development/libraries/givaro/3.7.nix b/pkgs/development/libraries/givaro/3.7.nix
index debddc6723fb..1de84afe6213 100644
--- a/pkgs/development/libraries/givaro/3.7.nix
+++ b/pkgs/development/libraries/givaro/3.7.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   buildInputs = [autoconf automake libtool gmpxx];
   meta = {
     inherit version;
-    description = ''A C++ library for arithmetic and algebraic computations'';
+    description = "A C++ library for arithmetic and algebraic computations";
     license = stdenv.lib.licenses.cecill-b;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/libraries/givaro/3.nix b/pkgs/development/libraries/givaro/3.nix
index efed0926bb32..fc9bb18988f4 100644
--- a/pkgs/development/libraries/givaro/3.nix
+++ b/pkgs/development/libraries/givaro/3.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   buildInputs = [autoconf automake libtool gmpxx];
   meta = {
     inherit version;
-    description = ''A C++ library for arithmetic and algebraic computations'';
+    description = "A C++ library for arithmetic and algebraic computations";
     license = stdenv.lib.licenses.cecill-b;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/libraries/givaro/default.nix b/pkgs/development/libraries/givaro/default.nix
index 78b6b0882707..4da5a0cb75c1 100644
--- a/pkgs/development/libraries/givaro/default.nix
+++ b/pkgs/development/libraries/givaro/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     inherit version;
-    description = ''A C++ library for arithmetic and algebraic computations'';
+    description = "A C++ library for arithmetic and algebraic computations";
     license = stdenv.lib.licenses.cecill-b;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/development/libraries/gle/default.nix b/pkgs/development/libraries/gle/default.nix
index d656473ba807..d0667b0f270e 100644
--- a/pkgs/development/libraries/gle/default.nix
+++ b/pkgs/development/libraries/gle/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation {
     sha256 = "09zs1di4dsssl9k322nzildvf41jwipbzhik9p43yb1bcfsp92nw";
   };
   meta = {
-    description = ''Tubing and extrusion library'';
+    description = "Tubing and extrusion library";
     license = stdenv.lib.licenses.gpl2 ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/libraries/qtinstaller/default.nix b/pkgs/development/libraries/qtinstaller/default.nix
index 3c4c192bd4b9..91f853711066 100644
--- a/pkgs/development/libraries/qtinstaller/default.nix
+++ b/pkgs/development/libraries/qtinstaller/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    description = ''Qt installer framework'';
+    description = "Qt installer framework";
     inherit (qtbase.meta) platforms license homepage;
   };
 }
diff --git a/pkgs/development/libraries/tachyon/default.nix b/pkgs/development/libraries/tachyon/default.nix
index 20dc80b253d2..90aa62d946f5 100644
--- a/pkgs/development/libraries/tachyon/default.nix
+++ b/pkgs/development/libraries/tachyon/default.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
   '';
   meta = {
     inherit version;
-    description = ''A Parallel / Multiprocessor Ray Tracing System'';
+    description = "A Parallel / Multiprocessor Ray Tracing System";
     license = stdenv.lib.licenses.bsd3;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = with stdenv.lib.platforms; linux ++ cygwin ++ darwin;
diff --git a/pkgs/development/lisp-modules/asdf/2.26.nix b/pkgs/development/lisp-modules/asdf/2.26.nix
index 2afdf05546fe..41b971ebae28 100644
--- a/pkgs/development/lisp-modules/asdf/2.26.nix
+++ b/pkgs/development/lisp-modules/asdf/2.26.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation {
   '';
   meta = {
     inherit (s) version;
-    description = ''Standard software-system definition library for Common Lisp'';
+    description = "Standard software-system definition library for Common Lisp";
     license = stdenv.lib.licenses.mit ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/lisp-modules/asdf/3.1.nix b/pkgs/development/lisp-modules/asdf/3.1.nix
index 445295830b25..9149155fb2f2 100644
--- a/pkgs/development/lisp-modules/asdf/3.1.nix
+++ b/pkgs/development/lisp-modules/asdf/3.1.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
   '';
   meta = {
     inherit (s) version;
-    description = ''Standard software-system definition library for Common Lisp'';
+    description = "Standard software-system definition library for Common Lisp";
     license = stdenv.lib.licenses.mit ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/development/lisp-modules/asdf/default.nix b/pkgs/development/lisp-modules/asdf/default.nix
index 2b1b846d319e..579788194473 100644
--- a/pkgs/development/lisp-modules/asdf/default.nix
+++ b/pkgs/development/lisp-modules/asdf/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation {
   '';
   meta = {
     inherit (s) version;
-    description = ''Standard software-system definition library for Common Lisp'';
+    description = "Standard software-system definition library for Common Lisp";
     license = stdenv.lib.licenses.mit ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/development/lisp-modules/clwrapper/default.nix b/pkgs/development/lisp-modules/clwrapper/default.nix
index 3cb8219e6874..821fe8920484 100644
--- a/pkgs/development/lisp-modules/clwrapper/default.nix
+++ b/pkgs/development/lisp-modules/clwrapper/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation {
   };
 
   meta = {
-    description = ''Script used to wrap Common Lisp implementations'';
+    description = "Script used to wrap Common Lisp implementations";
     maintainers = [stdenv.lib.maintainers.raskin];
   };
 }
diff --git a/pkgs/development/lisp-modules/lisp-packages.nix b/pkgs/development/lisp-modules/lisp-packages.nix
index f8338e48e19a..491597d760d7 100644
--- a/pkgs/development/lisp-modules/lisp-packages.nix
+++ b/pkgs/development/lisp-modules/lisp-packages.nix
@@ -85,7 +85,7 @@ let lispPackages = rec {
           buildSystems = [ "clx-truetype" ];
           parasites = [ "clx-truetype-test" ];
 
-          description = ''clx-truetype is pure common lisp solution for antialiased TrueType font rendering using CLX and XRender extension.'';
+          description = "clx-truetype is pure common lisp solution for antialiased TrueType font rendering using CLX and XRender extension.";
           deps = with pkgs.lispPackages; [
                   alexandria bordeaux-threads cl-aa cl-fad cl-paths cl-paths-ttf cl-store
                           cl-vectors clx trivial-features zpb-ttf
diff --git a/pkgs/development/perl-modules/Percona-Toolkit/default.nix b/pkgs/development/perl-modules/Percona-Toolkit/default.nix
index 85a11aaed46b..3c555ca37ab5 100644
--- a/pkgs/development/perl-modules/Percona-Toolkit/default.nix
+++ b/pkgs/development/perl-modules/Percona-Toolkit/default.nix
@@ -24,7 +24,7 @@ buildPerlPackage rec {
   '';
 
   meta = with lib; {
-    description = ''Collection of advanced command-line tools to perform a variety of MySQL and system tasks.'';
+    description = "Collection of advanced command-line tools to perform a variety of MySQL and system tasks.";
     homepage = "https://www.percona.com/software/database-tools/percona-toolkit";
     license = with licenses; [ gpl2 ];
     maintainers = with maintainers; [ izorkin ];
diff --git a/pkgs/development/python-modules/spark_parser/default.nix b/pkgs/development/python-modules/spark_parser/default.nix
index cfb641ddcfb5..ba927431f2c0 100644
--- a/pkgs/development/python-modules/spark_parser/default.nix
+++ b/pkgs/development/python-modules/spark_parser/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ click ];
 
   meta = with lib; {
-    description = ''An Early-Algorithm Context-free grammar Parser'';
+    description = "An Early-Algorithm Context-free grammar Parser";
     homepage = "https://github.com/rocky/python-spark";
     license = licenses.mit;
     maintainers = with maintainers; [raskin];
diff --git a/pkgs/os-specific/linux/sinit/default.nix b/pkgs/os-specific/linux/sinit/default.nix
index 71bd887535be..6a479453489b 100644
--- a/pkgs/os-specific/linux/sinit/default.nix
+++ b/pkgs/os-specific/linux/sinit/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
     ;
   meta = {
     inherit (s) version;
-    description = ''A very minimal Linux init implementation from suckless.org'';
+    description = "A very minimal Linux init implementation from suckless.org";
     license = stdenv.lib.licenses.mit ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/servers/http/nix-binary-cache/default.nix b/pkgs/servers/http/nix-binary-cache/default.nix
index 1403516876f8..a174d4dcb1a2 100644
--- a/pkgs/servers/http/nix-binary-cache/default.nix
+++ b/pkgs/servers/http/nix-binary-cache/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    description = ''A set of scripts to serve the Nix store as a binary cache'';
+    description = "A set of scripts to serve the Nix store as a binary cache";
     longDescription = ''
       This package installs a CGI script that serves Nix store path in the
       binary cache format. It also installs a launcher called
diff --git a/pkgs/servers/nosql/apache-jena/binary.nix b/pkgs/servers/nosql/apache-jena/binary.nix
index 4bf6693d3f95..71c8c4a45dc6 100644
--- a/pkgs/servers/nosql/apache-jena/binary.nix
+++ b/pkgs/servers/nosql/apache-jena/binary.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
   '';
   meta = {
     inherit (s) version;
-    description = ''RDF database'';
+    description = "RDF database";
     license = lib.licenses.asl20;
     maintainers = [lib.maintainers.raskin];
     platforms = lib.platforms.linux;
diff --git a/pkgs/servers/nosql/apache-jena/fuseki-binary.nix b/pkgs/servers/nosql/apache-jena/fuseki-binary.nix
index 17cf175b896e..7084130eaef8 100644
--- a/pkgs/servers/nosql/apache-jena/fuseki-binary.nix
+++ b/pkgs/servers/nosql/apache-jena/fuseki-binary.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation {
   '';
   meta = {
     inherit (s) version;
-    description = ''SPARQL server'';
+    description = "SPARQL server";
     license = lib.licenses.asl20;
     maintainers = [lib.maintainers.raskin];
     platforms = lib.platforms.linux;
diff --git a/pkgs/tools/X11/ratmen/default.nix b/pkgs/tools/X11/ratmen/default.nix
index eabe14649e1c..9c662a638e8a 100644
--- a/pkgs/tools/X11/ratmen/default.nix
+++ b/pkgs/tools/X11/ratmen/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
   ];
   meta = {
     inherit (s) version;
-    description = ''A minimalistic X11 menu creator'';
+    description = "A minimalistic X11 menu creator";
     license = lib.licenses.free ; # 9menu derivative with 9menu license
     maintainers = [lib.maintainers.raskin];
     platforms = lib.platforms.linux;
diff --git a/pkgs/tools/X11/skippy-xd/default.nix b/pkgs/tools/X11/skippy-xd/default.nix
index a52b7fa8c0d7..f38aa2c2c187 100644
--- a/pkgs/tools/X11/skippy-xd/default.nix
+++ b/pkgs/tools/X11/skippy-xd/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   '';
   meta = {
     inherit version;
-    description = ''Expose-style compositing-based standalone window switcher'';
+    description = "Expose-style compositing-based standalone window switcher";
     license = lib.licenses.gpl2Plus ;
     maintainers = [lib.maintainers.raskin];
     platforms = lib.platforms.linux;