diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index e2b4730b0d09..4120124d9bae 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -111,8 +111,8 @@ let
 
         postPatch = if isRuby25 then ''
           sed -i configure.ac -e '/config.guess/d'
-          cp ${config}/config.guess tool/
-          cp ${config}/config.sub tool/
+          cp --remove-destination ${config}/config.guess tool/
+          cp --remove-destination ${config}/config.sub tool/
         ''
         else opString useRailsExpress ''
           sed -i configure.in -e '/config.guess/d'
@@ -218,10 +218,10 @@ in {
   };
 
   ruby_2_5 = generic {
-    version = rubyVersion "2" "5" "1" "";
+    version = rubyVersion "2" "5" "2" "";
     sha256 = {
-      src = "1c99k0fjaq7k09104h1b1cqx6mrk2b14ic1jjnxc6yav68i1ij6s";
-      git = "1j0fd16aq9x98n0kq9c3kfp2sh6xcsq8q4733p0wfqjh3vz50kyj";
+      src = "0wgl1697sdiqh6ksgv40v627jp5557j1zi462krwnzhc9bk408xk";
+      git = "00xy323q2f2v102hfgsj9k20vggvvmyhd6byfhbc1qwz2vyrvc47";
     };
   };
 }
diff --git a/pkgs/development/interpreters/ruby/patchsets.nix b/pkgs/development/interpreters/ruby/patchsets.nix
index bf4a406e9874..151e9c483530 100644
--- a/pkgs/development/interpreters/ruby/patchsets.nix
+++ b/pkgs/development/interpreters/ruby/patchsets.nix
@@ -11,7 +11,7 @@ rec {
     "${patchSet}/patches/ruby/2.4/head/railsexpress/02-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/2.4/head/railsexpress/03-display-more-detailed-stack-trace.patch"
   ];
-  "2.5.1" = ops useRailsExpress [
+  "2.5.2" = ops useRailsExpress [
     "${patchSet}/patches/ruby/2.5/head/railsexpress/01-fix-broken-tests-caused-by-ad.patch"
     "${patchSet}/patches/ruby/2.5/head/railsexpress/02-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/2.5/head/railsexpress/03-more-detailed-stacktrace.patch"