diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index b056568b166..29f1aad2e48 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -3,15 +3,15 @@
 with stdenv.lib;
 
 buildLinux (args // rec {
-  version = "5.9-rc8";
-  extraMeta.branch = "5.9";
+  version = "5.10-rc1";
+  extraMeta.branch = "5.10";
 
   # modDirVersion needs to be x.y.z, will always add .0
   modDirVersion = if (modDirVersionArg == null) then builtins.replaceStrings ["-"] [".0-"] version else modDirVersionArg;
 
   src = fetchurl {
     url = "https://git.kernel.org/torvalds/t/linux-${version}.tar.gz";
-    sha256 = "0yhjanmrg0cjmdn7yq8nx0h7q3aq9cimqhn9k4nis1a976p8wpgw";
+    sha256 = "1s4ywf93xrlkjjq3c4142qhmsvx3kl0xwkbc09ss6gln8lwqnga8";
   };
 
   # Should the testing kernels ever be built on Hydra?
diff --git a/pkgs/os-specific/linux/kernel/manual-config.nix b/pkgs/os-specific/linux/kernel/manual-config.nix
index 92dc334135a..7a91705b617 100644
--- a/pkgs/os-specific/linux/kernel/manual-config.nix
+++ b/pkgs/os-specific/linux/kernel/manual-config.nix
@@ -233,10 +233,10 @@ let
         rm -fR drivers
 
         # Keep all headers
-        find .  -type f -name '*.h' -print0 | xargs -0 chmod u-w
+        find .  -type f -name '*.h' -print0 | xargs -0 -r chmod u-w
 
         # Keep linker scripts (they are required for out-of-tree modules on aarch64)
-        find .  -type f -name '*.lds' -print0 | xargs -0 chmod u-w
+        find .  -type f -name '*.lds' -print0 | xargs -0 -r chmod u-w
 
         # Keep root and arch-specific Makefiles
         chmod u-w Makefile
@@ -246,7 +246,7 @@ let
         chmod u-w -R scripts
 
         # Delete everything not kept
-        find . -type f -perm -u=w -print0 | xargs -0 rm
+        find . -type f -perm -u=w -print0 | xargs -0 -r rm
 
         # Delete empty directories
         find -empty -type d -delete