diff --git a/pkgs/os-specific/linux/zfs/generic.nix b/pkgs/os-specific/linux/zfs/generic.nix
index 56e37ec0b8474..d9cf4ff390094 100644
--- a/pkgs/os-specific/linux/zfs/generic.nix
+++ b/pkgs/os-specific/linux/zfs/generic.nix
@@ -69,38 +69,38 @@ let
       # The arrays must remain the same length, so we repeat a flag that is
       # already part of the command and therefore has no effect.
       substituteInPlace ./module/os/linux/zfs/zfs_ctldir.c \
-        --replace '"/usr/bin/env", "umount"' '"${util-linux}/bin/umount", "-n"' \
-        --replace '"/usr/bin/env", "mount"'  '"${util-linux}/bin/mount", "-n"'
+        --replace-warn '"/usr/bin/env", "umount"' '"${util-linux}/bin/umount", "-n"' \
+        --replace-warn '"/usr/bin/env", "mount"'  '"${util-linux}/bin/mount", "-n"'
     '' + optionalString buildUser ''
-      substituteInPlace ./lib/libshare/os/linux/nfs.c --replace "/usr/sbin/exportfs" "${
+      substituteInPlace ./lib/libshare/os/linux/nfs.c --replace-warn "/usr/sbin/exportfs" "${
         # We don't *need* python support, but we set it like this to minimize closure size:
         # If it's disabled by default, no need to enable it, even if we have python enabled
         # And if it's enabled by default, only change that if we explicitly disable python to remove python from the closure
         nfs-utils.override (old: { enablePython = old.enablePython or true && enablePython; })
       }/bin/exportfs"
-      substituteInPlace ./lib/libshare/smb.h        --replace "/usr/bin/net"            "${samba}/bin/net"
+      substituteInPlace ./lib/libshare/smb.h        --replace-warn "/usr/bin/net"            "${samba}/bin/net"
       # Disable dynamic loading of libcurl
-      substituteInPlace ./config/user-libfetch.m4   --replace "curl-config --built-shared" "true"
-      substituteInPlace ./config/user-systemd.m4    --replace "/usr/lib/modules-load.d" "$out/etc/modules-load.d"
-      substituteInPlace ./config/zfs-build.m4       --replace "\$sysconfdir/init.d"     "$out/etc/init.d" \
-                                                    --replace "/etc/default"            "$out/etc/default"
+      substituteInPlace ./config/user-libfetch.m4   --replace-warn "curl-config --built-shared" "true"
+      substituteInPlace ./config/user-systemd.m4    --replace-warn "/usr/lib/modules-load.d" "$out/etc/modules-load.d"
+      substituteInPlace ./config/zfs-build.m4       --replace-warn "\$sysconfdir/init.d"     "$out/etc/init.d" \
+                                                    --replace-warn "/etc/default"            "$out/etc/default"
       substituteInPlace ./contrib/initramfs/Makefile.am \
-        --replace "/usr/share/initramfs-tools" "$out/usr/share/initramfs-tools"
+        --replace-warn "/usr/share/initramfs-tools" "$out/usr/share/initramfs-tools"
     '' + optionalString isAtLeast22Series ''
       substituteInPlace ./udev/vdev_id \
-        --replace "PATH=/bin:/sbin:/usr/bin:/usr/sbin" \
+        --replace-warn "PATH=/bin:/sbin:/usr/bin:/usr/sbin" \
          "PATH=${makeBinPath [ coreutils gawk gnused gnugrep systemd ]}"
     '' + optionalString (!isAtLeast22Series) ''
-      substituteInPlace ./etc/zfs/Makefile.am --replace "\$(sysconfdir)/zfs" "$out/etc/zfs"
+      substituteInPlace ./etc/zfs/Makefile.am --replace-warn "\$(sysconfdir)/zfs" "$out/etc/zfs"
 
       find ./contrib/initramfs -name Makefile.am -exec sed -i -e 's|/usr/share/initramfs-tools|'$out'/share/initramfs-tools|g' {} \;
 
       substituteInPlace ./cmd/vdev_id/vdev_id \
-        --replace "PATH=/bin:/sbin:/usr/bin:/usr/sbin" \
+        --replace-warn "PATH=/bin:/sbin:/usr/bin:/usr/sbin" \
         "PATH=${makeBinPath [ coreutils gawk gnused gnugrep systemd ]}"
     '' + ''
       substituteInPlace ./config/zfs-build.m4 \
-        --replace "bashcompletiondir=/etc/bash_completion.d" \
+        --replace-warn "bashcompletiondir=/etc/bash_completion.d" \
           "bashcompletiondir=$out/share/bash-completion/completions"
     '';
 
@@ -176,7 +176,7 @@ let
            continue
          fi
          sed -i '/zfs-import-scan.service/d' $i
-         substituteInPlace $i --replace "zfs-import-cache.service" "zfs-import.target"
+         substituteInPlace $i --replace-warn "zfs-import-cache.service" "zfs-import.target"
       done
 
       # Remove tests because they add a runtime dependency on gcc
diff --git a/pkgs/os-specific/linux/zfs/unstable.nix b/pkgs/os-specific/linux/zfs/unstable.nix
index 3fb46077d886c..2c954d0155993 100644
--- a/pkgs/os-specific/linux/zfs/unstable.nix
+++ b/pkgs/os-specific/linux/zfs/unstable.nix
@@ -14,18 +14,18 @@ callPackage ./generic.nix args {
   # this attribute is the correct one for this package.
   kernelModuleAttribute = "zfs_unstable";
   # check the release notes for compatible kernels
-  kernelCompatible = kernel: kernel.kernelOlder "6.11";
+  kernelCompatible = kernel: kernel.kernelOlder "6.12";
 
   # this package should point to a version / git revision compatible with the latest kernel release
   # IMPORTANT: Always use a tagged release candidate or commits from the
   # zfs-<version>-staging branch, because this is tested by the OpenZFS
   # maintainers.
-  version = "2.2.6";
-  # rev = "";
+  version = "2.3.0-rc2";
+  rev = "zfs-2.3.0-rc2";
 
   tests = [
     nixosTests.zfs.unstable
   ];
 
-  hash = "sha256-wkgoYg6uQOHVq8a9sJXzO/QXJ6q28l7JXWkC+BFvOb0=";
+  hash = "sha256-/INlfiPpRm5JprcORzJJKyjpGIMY1LceY3yZ811uf2A=";
 }