I forgot that I need to patch rclone, whoops!

flake.nix

@@ -138,6 +138,11 @@
       ps3dec = pkgs.callPackage ./home/packages/ps3dec/package.nix {};
       sabretools = pkgs.callPackage ./home/packages/sabretools/package.nix {};
       rom-properties = pkgs.callPackage ./home/packages/rom-properties/package.nix {};
+      new_rclone = pkgs.rclone.overrideAttrs (
+        oldAttrs: {
+          patches = [ ./home/packages/new_rclone/patches/rclone_8ffe3e462cbf5688c37c54009db09d8dcb486860.diff ];
+        }
+      );
     };
   };
 }

home/packages/new_rclone/patches/rclone_8ffe3e462cbf5688c37c54009db09d8dcb486860.diff

@@ -0,0 +1,50 @@
+diff --git a/backend/webdav/chunking.go b/backend/webdav/chunking.go
+index 4cea798389f73..379079cf9f015 100644
+--- a/backend/webdav/chunking.go
++++ b/backend/webdav/chunking.go
+@@ -14,21 +14,30 @@ import (
+ 	"io"
+ 	"net/http"
+ 	"path"
++	"time"
+ 
+ 	"github.com/rclone/rclone/fs"
+ 	"github.com/rclone/rclone/lib/readers"
+ 	"github.com/rclone/rclone/lib/rest"
+ )
+ 
+-func (f *Fs) shouldRetryChunkMerge(ctx context.Context, resp *http.Response, err error) (bool, error) {
++func (f *Fs) shouldRetryChunkMerge(ctx context.Context, resp *http.Response, err error, sleepTime *time.Duration, wasLocked *bool) (bool, error) {
+ 	// Not found. Can be returned by NextCloud when merging chunks of an upload.
+ 	if resp != nil && resp.StatusCode == 404 {
++		if *wasLocked {
++			// Assume a 404 error after we've received a 423 error is actually a success
++			return false, nil
++		}
+ 		return true, err
+ 	}
+ 
+ 	// 423 LOCKED
+ 	if resp != nil && resp.StatusCode == 423 {
+-		return false, fmt.Errorf("merging the uploaded chunks failed with 423 LOCKED. This usually happens when the chunks merging is still in progress on NextCloud, but it may also indicate a failed transfer: %w", err)
++		*wasLocked = true
++		fs.Logf(f, "Sleeping for %v to wait for chunks to be merged after 423 error", *sleepTime)
++		time.Sleep(*sleepTime)
++		*sleepTime *= 2
++		return true, fmt.Errorf("merging the uploaded chunks failed with 423 LOCKED. This usually happens when the chunks merging is still in progress on NextCloud, but it may also indicate a failed transfer: %w", err)
+ 	}
+ 
+ 	return f.shouldRetry(ctx, resp, err)
+@@ -180,9 +189,11 @@ func (o *Object) mergeChunks(ctx context.Context, uploadDir string, options []fs
+ 	}
+ 	opts.ExtraHeaders = o.extraHeaders(ctx, src)
+ 	opts.ExtraHeaders["Destination"] = destinationURL.String()
++	sleepTime := 5 * time.Second
++	wasLocked := false
+ 	err = o.fs.pacer.Call(func() (bool, error) {
+ 		resp, err = o.fs.srv.Call(ctx, &opts)
+-		return o.fs.shouldRetryChunkMerge(ctx, resp, err)
++		return o.fs.shouldRetryChunkMerge(ctx, resp, err, &sleepTime, &wasLocked)
+ 	})
+ 	if err != nil {
+ 		return fmt.Errorf("finalize chunked upload failed, destinationURL: \"%s\": %w", destinationURL, err)

home/pkgs_and_programs.nix

@@ -14,8 +14,13 @@ let
     ps3dec = pkgs.callPackage ./packages/ps3dec/package.nix {};
     sabretools = pkgs.callPackage ./packages/sabretools/package.nix {};
     rom-properties = pkgs.callPackage ./packages/rom-properties/package.nix {};
+    new_rclone = pkgs.rclone.overrideAttrs (oldAttrs: rec {
+        patches = [ ./packages/new_rclone/patches/rclone_8ffe3e462cbf5688c37c54009db09d8dcb486860.diff ];
+      }
+    );
   };
 
+
 in
 {
   programs = {
@@ -107,7 +112,6 @@ in
     pkgs.pyrosimple
     pkgs.python3
     pkgs.quickbms
-    pkgs.rclone
     pkgs.screen
     pkgs.sshfs
     pkgs.unrar-wrapper
@@ -119,6 +123,7 @@ in
     my_packages.ird_tools
     my_packages.ps3dec
     my_packages.sabretools
+    my_packages.new_rclone
     # my_packages.rom-properties
 
     agenix.packages.${system}.default
@@ -133,6 +138,8 @@ in
       # Not needed on WSL
     pkgs.p7zip
       # Replaced in favour of nixpkgs#_7zz
+    # pkgs.rclone
+      # my_packages.new_rclone is the version with the patched build.
     pkgs.terminator
       # Not needed on WSL, even though I'd like it on WSL sometimes.
     pkgs.yt-dlp