diff --git a/pkgs/development/tools/ronn/Gemfile b/pkgs/development/tools/ronn/Gemfile
index 64f1df743abc..0643ca6ddfdf 100644
--- a/pkgs/development/tools/ronn/Gemfile
+++ b/pkgs/development/tools/ronn/Gemfile
@@ -1,3 +1,3 @@
 source "https://rubygems.org"
 
-gem "ronn"
+gem "ronn-ng"
diff --git a/pkgs/development/tools/ronn/Gemfile.lock b/pkgs/development/tools/ronn/Gemfile.lock
index ff71ebd7a01c..a7f76ffd7876 100644
--- a/pkgs/development/tools/ronn/Gemfile.lock
+++ b/pkgs/development/tools/ronn/Gemfile.lock
@@ -1,19 +1,25 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    hpricot (0.8.6)
-    mustache (1.0.3)
-    rdiscount (2.2.0.1)
-    ronn (0.7.3)
-      hpricot (>= 0.8.2)
-      mustache (>= 0.7.0)
-      rdiscount (>= 1.5.8)
+    kramdown (2.3.2)
+      rexml
+    mini_portile2 (2.8.0)
+    mustache (0.99.8)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    racc (1.6.0)
+    rexml (3.2.5)
+    ronn-ng (0.9.1)
+      kramdown (~> 2.1)
+      mustache (~> 0.7, >= 0.7.0)
+      nokogiri (~> 1.9, >= 1.9.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  ronn
+  ronn-ng
 
 BUNDLED WITH
-   2.1.4
+   2.3.9
diff --git a/pkgs/development/tools/ronn/default.nix b/pkgs/development/tools/ronn/default.nix
index 4d06db77a692..c3f0d2631848 100644
--- a/pkgs/development/tools/ronn/default.nix
+++ b/pkgs/development/tools/ronn/default.nix
@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation rec {
   pname = "ronn";
-  version = env.gems.ronn.version;
+  version = env.gems.ronn-ng.version;
 
   env = bundlerEnv {
     name = "ronn-gems";
@@ -11,12 +11,18 @@ stdenv.mkDerivation rec {
 
   dontUnpack = true;
 
-  nativeBuildInputs = [ makeWrapper ];
+  nativeBuildInputs = [
+    makeWrapper
+  ];
 
   installPhase = ''
+    runHook preInstall
+
     mkdir -p $out/bin
     makeWrapper ${env}/bin/ronn $out/bin/ronn \
       --set PATH ${groff}/bin
+
+    runHook postInstall
   '';
 
   passthru.updateScript = bundlerUpdateScript "ronn";
@@ -25,7 +31,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "markdown-based tool for building manpages";
-    homepage = "https://rtomayko.github.io/ronn/";
+    homepage = "https://github.com/apjanke/ronn-ng";
     license = licenses.mit;
     maintainers = with maintainers; [ zimbatm nicknovitski ];
     platforms = env.ruby.meta.platforms;
diff --git a/pkgs/development/tools/ronn/gemset.nix b/pkgs/development/tools/ronn/gemset.nix
index 534741a69938..04703a84a361 100644
--- a/pkgs/development/tools/ronn/gemset.nix
+++ b/pkgs/development/tools/ronn/gemset.nix
@@ -1,34 +1,75 @@
 {
-  hpricot = {
+  kramdown = {
+    dependencies = ["rexml"];
+    groups = ["default"];
+    platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1jn8x9ch79gqmnzgyz78kppavjh5lqx0y0r6frykga2b86rz9s6z";
+      sha256 = "0757lqaq593z8hzdv98nai73ag384dkk7jgj3mcq2r6ix7130ifb";
       type = "gem";
     };
-    version = "0.8.6";
+    version = "2.3.2";
+  };
+  mini_portile2 = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0rapl1sfmfi3bfr68da4ca16yhc0pp93vjwkj7y3rdqrzy3b41hy";
+      type = "gem";
+    };
+    version = "2.8.0";
   };
   mustache = {
+    groups = ["default"];
+    platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1v4pdvgvs8gw0zbh5sy3l308amlsjg8sdfrkml0g0m0wwj4x7naf";
+      sha256 = "1g5hplm0k06vwxwqzwn1mq5bd02yp0h3rym4zwzw26aqi7drcsl2";
       type = "gem";
     };
-    version = "1.0.3";
+    version = "0.99.8";
   };
-  rdiscount = {
+  nokogiri = {
+    dependencies = ["mini_portile2" "racc"];
+    groups = ["default"];
+    platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1arvk3k06prxasq1djbj065ixar4zl171340g7wr1ww4gj9makx3";
+      sha256 = "1g43ii497cwdqhfnaxfl500bq5yfc5hfv5df1lvf6wcjnd708ihd";
       type = "gem";
     };
-    version = "2.2.0.1";
+    version = "1.13.4";
   };
-  ronn = {
+  racc = {
+    groups = ["default"];
+    platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "07plsxxfx5bxdk72ii9za6km0ziqlq8jh3bicr4774dalga6zpw2";
+      sha256 = "0la56m0z26j3mfn1a9lf2l03qx1xifanndf9p3vx1azf6sqy7v9d";
       type = "gem";
     };
-    version = "0.7.3";
+    version = "1.6.0";
+  };
+  rexml = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "08ximcyfjy94pm1rhcx04ny1vx2sk0x4y185gzn86yfsbzwkng53";
+      type = "gem";
+    };
+    version = "3.2.5";
+  };
+  ronn-ng = {
+    dependencies = ["kramdown" "mustache" "nokogiri"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1slxfg57cabmh98fw507z4ka6lwq1pvbrqwppflxw6700pi8ykfh";
+      type = "gem";
+    };
+    version = "0.9.1";
   };
 }