using "sccache" with poudriere

I am unable to get “sccache” to work with poudriere. I have tried to
follow all the various “HOW-TO” examples, but nothing seems to work.
This is an excep[t from the latest poudriere build log:

---Begin make.conf---
USE_PACKAGE_DEPENDS=yes
BATCH=yes
WRKDIRPREFIX=/wrkdirs
PORTSDIR=/usr/ports
PACKAGES=/packages
DISTDIR=/distfiles
OVERLAYS+=/overlays/sccache
FORCE_PACKAGE=yes
PACKAGE_BUILDING=yes
PACKAGE_BUILDING_FLAVORS=yes
####  ####
DEFAULT_VERSIONS=samba=4.13 ssl=openssl mysql=8.0 php=8.1

SCCACHE_DIR=/usr/home/gerard/.ccache/sccache

WITH_CCACHE_BUILD=yes
CCACHE_DIR=/root/.ccache
#### Misc Poudriere ####
.include "/etc/make.conf.ports_env"
GID=0
UID=0
DISABLE_MAKE_JOBS=poudriere
---End make.conf---


===>   Returning to build of rust-1.66.1
===========================================================================
=======================<phase: configure
>============================ ===== env: NO_DEPENDS=yes USER=root UID=0
>GID=0
===>  Configuring for rust-1.66.1
==> Starting sccache
sccache: Starting the server...
sccache: Listening on port 0
Compile requests                      0
Compile requests executed             0
Cache hits                            0
Cache misses                          0
Cache timeouts                        0
Cache read errors                     0
Forced recaches                       0
Cache write errors                    0
Compilation failures                  0
Cache errors                          0
Non-cacheable compilations            0
Non-cacheable calls                   0
Non-compilation calls                 0
Unsupported compiler calls            0
Average cache write               0.000 s
Average cache read miss           0.000 s
Average cache read hit            0.000 s
Failed distributed compilations       0
Cache location                  Local disk:
"/usr/home/gerard/.ccache/sccache" Cache size
 0 bytes Max cache size                       16 GiB

After poudriere has finished building “rust”, the output of “sccache
-s” is the same:

sccache -s
Compile requests                      0
Compile requests executed             0
Cache hits                            0
Cache misses                          0
Cache timeouts                        0
Cache read errors                     0
Forced recaches                       0
Cache write errors                    0
Compilation failures                  0
Cache errors                          0
Non-cacheable compilations            0
Non-cacheable calls                   0
Non-compilation calls                 0
Unsupported compiler calls            0
Average cache write               0.000 s
Average cache read miss           0.000 s
Average cache read hit            0.000 s
Failed distributed compilations       0
Cache location                  Local disk:
"/home/gerard/.cache/sccache" Cache size                            0
bytes Max cache size                       10 GiB

It is evident that it did not cache anything. “ccache”; however, it
seems to be working perfectly. I was told to place the following entry
in the “/usr/local/etc/poudriere.d/make.conf” file:

SCCACHE_DIR=/usr/home/gerard/.ccache/sccache

I did so; however, nothing seemed to have changed. I am also confused
about where the “CCACHE_DIR=/root/.ccache” setting originates.

-- 
Jerry