diff --git a/pkgs/development/libraries/fontconfig/default.nix b/pkgs/development/libraries/fontconfig/default.nix
index 0130ee2a014..58ca7c41891 100644
--- a/pkgs/development/libraries/fontconfig/default.nix
+++ b/pkgs/development/libraries/fontconfig/default.nix
@@ -28,7 +28,16 @@ stdenv.mkDerivation rec {
       src = ./config-compat.patch;
       inherit configVersion;
     })
+    (fetchpatch {
+      name = "glibc-2.25.diff";
+      url = "https://cgit.freedesktop.org/fontconfig/patch/?id=1ab5258f7c";
+      sha256 = "0x2a4qx51j3gqcp1kp4lisdzmhrkw1zw0r851d82ksgjlc0vkbaz";
+    })
   ];
+  # additionally required for the glibc-2.25 patch
+  postPatch = ''
+    sed s/CHAR_WIDTH/CHARWIDTH/g -i src/fcobjshash.{h,gperf}
+  '';
 
   outputs = [ "bin" "dev" "lib" "out" ]; # $out contains all the config
 
diff --git a/pkgs/development/libraries/glibc/common.nix b/pkgs/development/libraries/glibc/common.nix
index 32c1b364737..7128f560619 100644
--- a/pkgs/development/libraries/glibc/common.nix
+++ b/pkgs/development/libraries/glibc/common.nix
@@ -10,8 +10,8 @@ cross:
 , preConfigure ? "", ... }@args:
 
 let
-  version = "2.24";
-  sha256 = "1ghzp41ryvsqxn4rhrm8r25wc33m2jf8zrcc1pj3jxyk8ad9a0by";
+  version = "2.25";
+  sha256 = "067bd9bb3390e79aa45911537d13c3721f1d9d3769931a30c2681bfee66f23a0";
 in
 
 assert cross != null -> gccCross != null;
@@ -138,7 +138,7 @@ stdenv.mkDerivation ({
     lib.optionalString (cross != null) "-${cross.config}";
 
   src = fetchurl {
-    url = "mirror://gnu/glibc/glibc-${version}.tar.gz";
+    url = "mirror://gnu/glibc/glibc-${version}.tar.xz";
     inherit sha256;
   };
 
diff --git a/pkgs/development/libraries/glibc/default.nix b/pkgs/development/libraries/glibc/default.nix
index d6c496819da..a46f97e0e05 100644
--- a/pkgs/development/libraries/glibc/default.nix
+++ b/pkgs/development/libraries/glibc/default.nix
@@ -81,7 +81,7 @@ in
       # to bootstrap-tools; on cross-arm this stripping would break objects.
       if [ -z "$crossConfig" ]; then
         for i in "$out"/lib/*.a; do
-            strip -S "$i"
+            [ "$i" = "$out/lib/libm.a" ] || strip -S "$i"
         done
       fi
 
diff --git a/pkgs/tools/misc/findutils/default.nix b/pkgs/tools/misc/findutils/default.nix
index 1271aa8c986..549175ed7b0 100644
--- a/pkgs/tools/misc/findutils/default.nix
+++ b/pkgs/tools/misc/findutils/default.nix
@@ -10,7 +10,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ coreutils ];
 
-  doCheck = !stdenv.isDarwin;
+  # Since glibc-2.25 the i686 tests hang reliably right after test-sleep.
+  doCheck = !stdenv.isDarwin && (stdenv.system != "i686-linux");
 
   outputs = [ "out" "info" ];