bug#69667: build of sway-1.9-checkout.drv failed

[chris]

guix home reconfigure fails at sway-1.9. The bottom of the drv file shows this,
```
`source is at 'sway-1.9-checkout'
Backtrace:
          10 (primitive-load "/gnu/store/5ahfcp5009pgdh17lg5y01w4vhv…")
In ice-9/eval.scm:
    619:8  9 (_ #(#(#<directory (guile-user) 7ffff77f7c80> "swa…") #))
In ice-9/boot-9.scm:
    142:2  8 (dynamic-wind _ _ #<procedure 7ffff77aa3c0 at ice-9/eva…>)
In system/base/compile.scm:
   352:28  7 (compile _ #:from _ #:to _ #:env _ #:optimization-level …)
   265:44  6 (_ _ _)
   265:44  5 (_ _ _)
   265:44  4 (_ _ _)
   261:27  3 (_ _ _)
In ice-9/boot-9.scm:
   2836:4  2 (save-module-excursion #<procedure 7ffff3d9bb40 at lang…>)
In language/bytecode/spec.scm:
    43:19  1 (_)
In unknown file:
           0 (delete-file "contrib/grimshot.1")

ERROR: In procedure delete-file:
In procedure delete-file: No such file or directory
/gnu/store/5wqhngwwzaa9b9g1apxr8lawk3g8sxwm-sway-1.9-checkout/assets/Sway_Wallpaper_Blue_1136x640_Portrait.png'
 -> `sway-1.9-checkout/assets/Sway_Wallpaper_Blue_1136x640_Portrait.png'
`/gnu/store/5wqhngwwzaa9b9g1apxr8lawk3g8sxwm-sway-1.9-checkout/assets/Sway_Wallpaper_Blue_768x1024.png'
 -> `sway-1.9-checkout/assets/Sway_Wallpaper_Blue_768x1024.png'
`/gnu/store/5wqhngwwzaa9b9g1apxr8lawk3g8sxwm-sway-1.9-checkout/assets/Sway_Wallpaper_Blue_1920x1080.png'
 -> `sway-1.9-checkout/assets/Sway_Wallpaper_Blue_1920x1080.png'
`/gnu/store/5wqhngwwzaa9b9g1apxr8lawk3g8sxwm-sway-1.9-checkout/assets/Sway_Logo+Text_Ver3.svg'
 -> `sway-1.9-checkout/assets/Sway_Logo+Text_Ver3.svg'
`/gnu/store/5wqhngwwzaa9b9g1apxr8lawk3g8sxwm-sway-1.9-checkout/assets/Sway_Tree.svg'
 -> `sway-1.9-checkout/assets/Sway_Tree.svg'
`/gnu/store/5wqhngwwzaa9b9g1apxr8lawk3g8sxwm-sway-1.9-checkout/assets/Sway_Logo+Text_Ver1_1500x716.png'
 -> `sway-1.9-checkout/assets/Sway_Logo+Text_Ver1_1500x716.png'
`/gnu/store/5wqhngwwzaa9b9g1apxr8lawk3g8sxwm-sway-1.9-checkout/assets/Sway_Logo+Text_Ver4.png'
 -> `sway-1.9-checkout/assets/Sway_Logo+Text_Ver4.png'
```