diff --git a/pkgs/development/ruby-modules/bundler-env/default.nix b/pkgs/development/ruby-modules/bundler-env/default.nix
index 56a3b371d1d..57ca23d4143 100644
--- a/pkgs/development/ruby-modules/bundler-env/default.nix
+++ b/pkgs/development/ruby-modules/bundler-env/default.nix
@@ -6,7 +6,14 @@
 , tree
 }@defs:
 
-{ name, gemset, gemfile, lockfile, ruby ? defs.ruby, gemConfig ? defaultGemConfig
+{ name ? null
+, pname ? null
+, gemdir ? null
+, gemfile ? null
+, lockfile ? null
+, gemset ? null
+, ruby ? defs.ruby
+, gemConfig ? defaultGemConfig
 , postBuild ? null
 , document ? []
 , meta ? {}
@@ -16,54 +23,95 @@
 }@args:
 
 let
-  importedGemset = import gemset;
+  drvName =
+    if name != null then name
+    else if pname != null then "${toString pname}-${mainGem.version}"
+    else throw "bundlerEnv: either pname or name must be set";
+
+  mainGem =
+    if pname == null then null
+    else gems."${pname}" or (throw "bundlerEnv: gem ${pname} not found");
+
+  gemfile' =
+    if gemfile == null then gemdir + "/Gemfile"
+    else gemfile;
+
+  lockfile' =
+    if lockfile == null then gemdir + "/Gemfile.lock"
+    else lockfile;
+
+  gemset' =
+    if gemset == null then gemdir + "/gemset.nix"
+    else gemset;
+
+  importedGemset = import gemset';
+
   filteredGemset = (lib.filterAttrs (name: attrs:
     if (builtins.hasAttr "groups" attrs)
     then (builtins.any (gemGroup: builtins.any (group: group == gemGroup) groups) attrs.groups)
     else true
   ) importedGemset);
+
   applyGemConfigs = attrs:
     (if gemConfig ? "${attrs.gemName}"
     then attrs // gemConfig."${attrs.gemName}" attrs
     else attrs);
+
   configuredGemset = lib.flip lib.mapAttrs filteredGemset (name: attrs:
     applyGemConfigs (attrs // { inherit ruby; gemName = name; })
   );
+
   hasBundler = builtins.hasAttr "bundler" filteredGemset;
-  bundler = if hasBundler then gems.bundler else defs.bundler.override (attrs: { inherit ruby; });
+
+  bundler =
+    if hasBundler then gems.bundler
+    else defs.bundler.override (attrs: { inherit ruby; });
+
   gems = lib.flip lib.mapAttrs configuredGemset (name: attrs:
     buildRubyGem ((removeAttrs attrs ["source"]) // attrs.source // {
       inherit ruby;
       gemName = name;
       gemPath = map (gemName: gems."${gemName}") (attrs.dependencies or []);
     }));
+
   # We have to normalize the Gemfile.lock, otherwise bundler tries to be
   # helpful by doing so at run time, causing executables to immediately bail
   # out. Yes, I'm serious.
   confFiles = runCommand "gemfile-and-lockfile" {} ''
     mkdir -p $out
-    cp ${gemfile} $out/Gemfile
-    cp ${lockfile} $out/Gemfile.lock
+    cp ${gemfile'} $out/Gemfile
+    cp ${lockfile'} $out/Gemfile.lock
   '';
+
   envPaths = lib.attrValues gems ++ lib.optional (!hasBundler) bundler;
+
+  binPaths = if mainGem != null then [ mainGem ] else envPaths;
+
   bundlerEnv = buildEnv {
-    inherit name ignoreCollisions;
+    inherit ignoreCollisions;
+
+    name = drvName;
+
     paths = envPaths;
     pathsToLink = [ "/lib" ];
+
     postBuild = ''
       ${ruby}/bin/ruby ${./gen-bin-stubs.rb} \
         "${ruby}/bin/ruby" \
         "${confFiles}/Gemfile" \
         "$out/${ruby.gemPath}" \
         "${bundler}/${ruby.gemPath}" \
-        ${lib.escapeShellArg envPaths} \
+        ${lib.escapeShellArg binPaths} \
         ${lib.escapeShellArg groups}
     '' + lib.optionalString (postBuild != null) postBuild;
+
+    meta = { platforms = ruby.meta.platforms; } // meta;
+
     passthru = rec {
-      inherit ruby bundler meta gems;
+      inherit ruby bundler gems;
 
       wrappedRuby = stdenv.mkDerivation {
-        name = "wrapped-ruby-${name}";
+        name = "wrapped-ruby-${drvName}";
         nativeBuildInputs = [ makeWrapper ];
         buildCommand = ''
           mkdir -p $out/bin
@@ -87,7 +135,7 @@ let
           require 'bundler/setup'
         '';
         in stdenv.mkDerivation {
-          name = "interactive-${name}-environment";
+          name = "interactive-${drvName}-environment";
           nativeBuildInputs = [ wrappedRuby bundlerEnv ];
           shellHook = ''
             export OLD_IRBRC="$IRBRC"
@@ -102,7 +150,5 @@ let
         };
     };
   };
-
 in
-
-bundlerEnv
+  bundlerEnv
diff --git a/pkgs/development/tools/misc/travis/default.nix b/pkgs/development/tools/misc/travis/default.nix
index adc63ce7c43..9e7d6e3c606 100644
--- a/pkgs/development/tools/misc/travis/default.nix
+++ b/pkgs/development/tools/misc/travis/default.nix
@@ -1,29 +1,14 @@
-{ stdenv, lib, bundlerEnv, ruby }:
+{ lib, bundlerEnv, ruby }:
 
-stdenv.mkDerivation rec {
-  name = "travis-${version}";
-  version = env.gems.travis.version;
-
-  env = bundlerEnv {
-    inherit ruby;
-    name = "${name}-gems";
-    gemset = ./gemset.nix;
-    gemfile = ./Gemfile;
-    lockfile = ./Gemfile.lock;
-  };
-
-  phases = ["installPhase"];
-
-  installPhase = ''
-    mkdir -p $out/bin
-    ln -s ${env}/bin/travis $out/bin/travis
-  '';
+bundlerEnv {
+  inherit ruby;
+  pName = "travis";
+  gemdir = ./.;
 
   meta = with lib; {
     description = "CLI and Ruby client library for Travis CI";
     homepage    = https://github.com/travis-ci/travis.rb;
     license     = licenses.mit;
     maintainers = with maintainers; [ zimbatm ];
-    platforms   = ruby.meta.platforms;
   };
 }
diff --git a/pkgs/servers/monitoring/riemann-dash/default.nix b/pkgs/servers/monitoring/riemann-dash/default.nix
index 32f543fbf2f..c2d197e6b45 100644
--- a/pkgs/servers/monitoring/riemann-dash/default.nix
+++ b/pkgs/servers/monitoring/riemann-dash/default.nix
@@ -1,21 +1,9 @@
-{ bundlerEnv, lib, stdenv }:
+{ bundlerEnv, lib, ruby }:
 
-let
-  name = "riemann-dash-${env.gems.riemann-dash.version}";
-
-  env = bundlerEnv {
-    inherit name;
-    gemfile = ./Gemfile;
-    lockfile = ./Gemfile.lock;
-    gemset = ./gemset.nix;
-  };
-
-in stdenv.mkDerivation {
-  inherit name;
-  buildCommand = ''
-    mkdir -p $out/bin
-    ln -s ${env}/bin/riemann-dash $out/bin/riemann-dash
-  '';
+bundlerEnv {
+  inherit ruby;
+  pName = "riemann-dash";
+  gemdir = ./.;
 
   meta = with lib; {
     description = "A javascript, websockets-powered dashboard for Riemann";
diff --git a/pkgs/tools/misc/fluentd/default.nix b/pkgs/tools/misc/fluentd/default.nix
index 4c5de744840..25e083b6bf5 100644
--- a/pkgs/tools/misc/fluentd/default.nix
+++ b/pkgs/tools/misc/fluentd/default.nix
@@ -1,12 +1,10 @@
 { stdenv, lib, bundlerEnv, ruby, curl }:
 
 bundlerEnv {
-  name = "fluentd-0.14.0";
-
   inherit ruby;
-  gemfile = ./Gemfile;
-  lockfile = ./Gemfile.lock;
-  gemset = ./gemset.nix;
+
+  pname = "fluentd";
+  gemdir = ./.;
 
   meta = with lib; {
     description = "A data collector";
diff --git a/pkgs/tools/misc/lolcat/default.nix b/pkgs/tools/misc/lolcat/default.nix
index 21355652d3e..21377d7bfa4 100644
--- a/pkgs/tools/misc/lolcat/default.nix
+++ b/pkgs/tools/misc/lolcat/default.nix
@@ -2,12 +2,10 @@
 , pkgconfig, which }:
 
 bundlerEnv {
-  name = "lolcat-42.1.0";
-
   inherit ruby;
-  gemfile = ./Gemfile;
-  lockfile = ./Gemfile.lock;
-  gemset = ./gemset.nix;
+
+  pname = "lolcat";
+  gemdir = ./.;
 
   meta = with lib; {
     description = "A rainbow version of cat";
diff --git a/pkgs/tools/package-management/fpm/default.nix b/pkgs/tools/package-management/fpm/default.nix
index ca2e44fcaf0..4a18bfb5345 100644
--- a/pkgs/tools/package-management/fpm/default.nix
+++ b/pkgs/tools/package-management/fpm/default.nix
@@ -1,13 +1,9 @@
 { lib, bundlerEnv, ruby }:
 
 bundlerEnv rec {
-  name = "fpm-${version}";
-
-  version = (import gemset).fpm.version;
   inherit ruby;
-  gemfile = ./Gemfile;
-  lockfile = ./Gemfile.lock;
-  gemset = ./gemset.nix;
+  pname = "fpm";
+  gemdir = ./.;
 
   meta = with lib; {
     description = "Tool to build packages for multiple platforms with ease";
diff --git a/pkgs/tools/system/foreman/default.nix b/pkgs/tools/system/foreman/default.nix
index 594947c265a..1c74724793d 100644
--- a/pkgs/tools/system/foreman/default.nix
+++ b/pkgs/tools/system/foreman/default.nix
@@ -1,24 +1,9 @@
-{ stdenv, lib, ruby, bundlerEnv, makeWrapper }:
+{ bundlerEnv, lib, ruby }:
 
-stdenv.mkDerivation rec {
-  name = "foreman-${env.gems.foreman.version}";
-
-  env = bundlerEnv {
-    inherit ruby;
-    name = "${name}-gems";
-    gemfile = ./Gemfile;
-    lockfile = ./Gemfile.lock;
-    gemset = ./gemset.nix;
-  };
-
-  phases = ["installPhase"];
-
-  nativeBuildInputs = [ makeWrapper ];
-
-  installPhase = ''
-    mkdir -p $out/bin
-    makeWrapper ${env}/bin/foreman $out/bin/foreman
-  '';
+bundlerEnv {
+  inherit ruby;
+  pName = "foreman";
+  gemdir = ./.;
 
   meta = with lib; {
     description = "Process manager for applications with multiple components";
diff --git a/pkgs/tools/system/hiera-eyaml/default.nix b/pkgs/tools/system/hiera-eyaml/default.nix
index 615a66f8655..029a975dc91 100644
--- a/pkgs/tools/system/hiera-eyaml/default.nix
+++ b/pkgs/tools/system/hiera-eyaml/default.nix
@@ -1,22 +1,9 @@
-{ lib, bundlerEnv, stdenv }:
+{ lib, bundlerEnv, ruby }:
 
-let
-  name = "hiera-eyaml-${env.gems.hiera-eyaml.version}";
-
-  env = bundlerEnv {
-    inherit name;
-    gemfile = ./Gemfile;
-    lockfile = ./Gemfile.lock;
-    gemset = ./gemset.nix;
-  };
-
-in stdenv.mkDerivation {
-  inherit name;
-
-  buildCommand = ''
-    mkdir -p $out/bin
-    ln -s ${env}/bin/eyaml $out/bin/eyaml
-  '';
+bundlerEnv {
+  inherit ruby;
+  pName = "hiera-eyaml";
+  gemdir = ./.;
 
   meta = with lib; {
     description = "Per-value asymmetric encryption of sensitive data for Hiera";
diff --git a/pkgs/tools/typesetting/asciidoctor/default.nix b/pkgs/tools/typesetting/asciidoctor/default.nix
index dd90444d6af..495a5fcf882 100644
--- a/pkgs/tools/typesetting/asciidoctor/default.nix
+++ b/pkgs/tools/typesetting/asciidoctor/default.nix
@@ -1,19 +1,9 @@
 { stdenv, lib, bundlerEnv, ruby_2_2, curl }:
 
 bundlerEnv rec {
-  name = "asciidoctor-${version}";
-  version = "1.5.4";
-
+  pname = "asciidoctor";
   ruby = ruby_2_2;
-  gemfile = ./Gemfile;
-  lockfile = ./Gemfile.lock;
-  gemset = ./gemset.nix;
-
-  # Delete dependencies' executables
-  postBuild = ''
-    find $out/bin -type f -not -wholename '*bin/asciidoctor*' -print0 \
-    | xargs -0 rm
-  '';
+  gemdir = ./.;
 
   meta = with lib; {
     description = "A faster Asciidoc processor written in Ruby";