Removing 1 entry (19.5K) under _build

  -------------------------------------------------------------------------
      SIZE  LAST BUILD    BUILD FOLDER
  -------------------------------------------------------------------------
     19.5K  3 days ago    _build
        0B  3 days ago    └── removed (0 of 1 entry)
  -------------------------------------------------------------------------

  -------------------------------------------------------------------------
      SIZE  LAST BUILD    BY TOOLCHAIN VARIANT
  -------------------------------------------------------------------------
     19.5K  3 days ago    └── ✘✘✘ gcc15
     19.5K  3 days ago            └── ✗✗✗ dbg/x86_64/cxx2c
  -------------------------------------------------------------------------

  -------------------------------------------------------------------------
      SIZE  REMOVED       BY SCONSCRIPT
  -------------------------------------------------------------------------
     19.5K     ✘✘✘        └── lib
     19.5K     ✗✗✗            └── gcc15
     19.5K      ✗                 └── dbg/x86_64/cxx2c
  -------------------------------------------------------------------------

Not all requested build entries could be removed: [1 error][0 warnings][0 notes]
│
└── 1 error
    │
    └── lib/gcc15/dbg/x86_64/cxx2c
        └── [Errno 13] Permission denied: [_build/lib/gcc15/dbg/x86_64/cxx2c/working]

Removed 0 entries freeing up 0B of disk space.

Verify the removal with the same selection by adding --list-builds:

cuppa -D --dbg --toolchains=gcc15 --list-builds
