diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-assert.nix b/pkgs/development/ocaml-modules/janestreet/ppx-assert.nix
index e42bc80e9dd2..b61874d3a7ea 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-assert.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-assert.nix
@@ -9,7 +9,7 @@ buildOcamlJane rec {
       ppx_type_conv sexplib ];
 
   meta = with stdenv.lib; {
-    description = "Assert-like extension nodes that raise useful errors on failure.";
+    description = "Assert-like extension nodes that raise useful errors on failure";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-bench.nix b/pkgs/development/ocaml-modules/janestreet/ppx-bench.nix
index a41773b6f683..56a124c5b691 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-bench.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-bench.nix
@@ -11,7 +11,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_driver ppx_inline_test ppx_tools ];
 
   meta = with stdenv.lib; {
-    description = "Syntax extension for writing in-line benchmarks in ocaml code.";
+    description = "Syntax extension for writing in-line benchmarks in ocaml code";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-compare.nix b/pkgs/development/ocaml-modules/janestreet/ppx-compare.nix
index f24c82dd6a76..d70fe6ddd550 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-compare.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-compare.nix
@@ -8,7 +8,7 @@ buildOcamlJane rec {
     [ppx_core ppx_driver ppx_tools ppx_type_conv ];
 
   meta = with stdenv.lib; {
-    description = "Generation of fast comparison functions from type expressions and definitions.";
+    description = "Generation of fast comparison functions from type expressions and definitions";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-custom-printf.nix b/pkgs/development/ocaml-modules/janestreet/ppx-custom-printf.nix
index f96d5bf4ca60..3fe78e3e7e2e 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-custom-printf.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-custom-printf.nix
@@ -8,7 +8,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_driver ppx_sexp_conv ppx_tools ];
 
   meta = with stdenv.lib; {
-    description = "Extensions to printf-style format-strings for user-defined string conversion.";
+    description = "Extensions to printf-style format-strings for user-defined string conversion";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-driver.nix b/pkgs/development/ocaml-modules/janestreet/ppx-driver.nix
index ca6cc7464da6..7844756c7bfb 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-driver.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-driver.nix
@@ -8,7 +8,7 @@ buildOcamlJane rec {
     [ ppx_core ppx_optcomp ];
 
   meta = with stdenv.lib; {
-    description = "A driver is an executable created from a set of OCaml AST transformers linked together with a command line frontend.";
+    description = "A driver is an executable created from a set of OCaml AST transformers linked together with a command line frontend";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-enumerate.nix b/pkgs/development/ocaml-modules/janestreet/ppx-enumerate.nix
index 874380cf03a5..8dbf34ed2329 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-enumerate.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-enumerate.nix
@@ -7,7 +7,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_tools ppx_type_conv ];
 
   meta = with stdenv.lib; {
-    description = "Generate a list containing all values of a finite type.";
+    description = "Generate a list containing all values of a finite type";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-fail.nix b/pkgs/development/ocaml-modules/janestreet/ppx-fail.nix
index 5ffa12ebdb41..187d5db19995 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-fail.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-fail.nix
@@ -7,7 +7,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_driver ppx_here ppx_tools ];
 
   meta = with stdenv.lib; {
-    description = "Syntax extension that makes failwith include a position.";
+    description = "Syntax extension that makes failwith include a position";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-fields-conv.nix b/pkgs/development/ocaml-modules/janestreet/ppx-fields-conv.nix
index 15a479ab1824..a05cf149b268 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-fields-conv.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-fields-conv.nix
@@ -7,7 +7,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_tools ppx_type_conv ];
 
   meta = with stdenv.lib; {
-    description = "Generation of accessor and iteration functions for ocaml records.";
+    description = "Generation of accessor and iteration functions for ocaml records";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-here.nix b/pkgs/development/ocaml-modules/janestreet/ppx-here.nix
index 6821a1df35bc..3aa157a68c5b 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-here.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-here.nix
@@ -7,7 +7,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_driver ];
 
   meta = with stdenv.lib; {
-    description = "A ppx rewriter that defines an extension node whose value is its source position.";
+    description = "A ppx rewriter that defines an extension node whose value is its source position";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-inline-test.nix b/pkgs/development/ocaml-modules/janestreet/ppx-inline-test.nix
index 26dd7d70c444..cd16d7c32864 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-inline-test.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-inline-test.nix
@@ -7,7 +7,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_driver ppx_tools ];
 
   meta = with stdenv.lib; {
-    description = "Syntax extension for writing in-line tests in ocaml code.";
+    description = "Syntax extension for writing in-line tests in ocaml code";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-jane.nix b/pkgs/development/ocaml-modules/janestreet/ppx-jane.nix
index d138ef0b24e2..86394f228e9d 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-jane.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-jane.nix
@@ -15,7 +15,7 @@ buildOcamlJane rec {
       ppx_sexp_message ppx_sexp_value ppx_typerep_conv ppx_variants_conv ];
 
   meta = with stdenv.lib; {
-    description = "ppx_jane is a ppx_driver including all standard ppx rewriters.";
+    description = "A ppx_driver including all standard ppx rewriters";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-sexp-conv.nix b/pkgs/development/ocaml-modules/janestreet/ppx-sexp-conv.nix
index a36a80a05596..128a59daec2e 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-sexp-conv.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-sexp-conv.nix
@@ -7,7 +7,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_tools ppx_type_conv sexplib];
 
   meta = with stdenv.lib; {
-    description = "A ppx rewriter that defines an extension node whose value is its source position.";
+    description = "A ppx rewriter that defines an extension node whose value is its source position";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-sexp-value.nix b/pkgs/development/ocaml-modules/janestreet/ppx-sexp-value.nix
index fc7f043f8a1a..a1a1080d73d7 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-sexp-value.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-sexp-value.nix
@@ -7,7 +7,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_driver ppx_here ppx_sexp_conv ppx_tools ];
 
   meta = with stdenv.lib; {
-    description = "A ppx rewriter that simplifies building S-Expression from OCaml Values.";
+    description = "A ppx rewriter that simplifies building S-Expression from OCaml Values";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-type-conv.nix b/pkgs/development/ocaml-modules/janestreet/ppx-type-conv.nix
index 6a7588e13abc..fc6d9ca03459 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-type-conv.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-type-conv.nix
@@ -8,7 +8,7 @@ buildOcamlJane rec {
     [ ppx_core ppx_deriving ppx_driver ppx_tools ];
 
   meta = with stdenv.lib; {
-    description = "The type_conv library factors out functionality needed by different preprocessors that generate code from type specifications.";
+    description = "The type_conv library factors out functionality needed by different preprocessors that generate code from type specifications";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };
diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-variants-conv.nix b/pkgs/development/ocaml-modules/janestreet/ppx-variants-conv.nix
index d707df93a16d..e5efb786a943 100644
--- a/pkgs/development/ocaml-modules/janestreet/ppx-variants-conv.nix
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-variants-conv.nix
@@ -7,7 +7,7 @@ buildOcamlJane rec {
   propagatedBuildInputs = [ ppx_core ppx_tools ppx_type_conv sexplib];
 
   meta = with stdenv.lib; {
-    description = "Generation of accessor and iteration functions for ocaml variant types.";
+    description = "Generation of accessor and iteration functions for ocaml variant types";
     maintainers = [ maintainers.maurer ];
     license = licenses.asl20;
   };