we have some breakage on the CI after PR6747 got merged; it seems to have to do with sccache

Starting: sccache
==============================================================================
Task         : Cache
Description  : Cache files between runs
Version      : 2.0.1
Author       : Microsoft Corporation
Help         : <https://aka.ms/pipeline-caching-docs>
==============================================================================
Resolving key:
 - sccache                                  [string]
 - Windowsx64                               [string]
 - 1                                        [string]
 - ffa3da4941541840f758b286a4d21cdd4b39371d [string]
Resolved to: sccache|Windowsx64|1|ffa3da4941541840f758b286a4d21cdd4b39371d
ApplicationInsightsTelemetrySender will correlate events with X-TFS-Session 95dd5087-53d6-4ba9-ae3b-df4f598e15db
Getting a pipeline cache artifact with one of the following fingerprints:
Fingerprint: `sccache|Windowsx64|1|ffa3da4941541840f758b286a4d21cdd4b39371d`
There is a cache miss.
Resolving path:
 - D:\a\1\sccache [directory]
Resolved to: sccache
DedupManifestArtifactClient will correlate http requests with X-TFS-Session 95dd5087-53d6-4ba9-ae3b-df4f598e15db
DedupManifestArtifactClient will correlate http requests with X-TFS-Session 95dd5087-53d6-4ba9-ae3b-df4f598e15db
DedupManifestArtifactClient will correlate http requests with X-TFS-Session 95dd5087-53d6-4ba9-ae3b-df4f598e15db
DedupManifestArtifactClient will correlate http requests with X-TFS-Session 95dd5087-53d6-4ba9-ae3b-df4f598e15db
ApplicationInsightsTelemetrySender correlated 3 events with X-TFS-Session 95dd5087-53d6-4ba9-ae3b-df4f598e15db
##[error]The path provided is invalid.
Finishing: sccache