sccache-dist errors when compiling ring crate

[to266]

To reproduce, simply set up the sccache to have some kind of server and scheduler available (in my case all parties are linux boxes), and then

cargo new example \
 && cd example \
 && cargo add ring \
 && RUSTC_WRAPPER=sccache cargo build

results in

   Compiling libc v0.2.155
   Compiling cc v1.0.98
   Compiling cfg-if v1.0.0
   Compiling spin v0.9.8
   Compiling untrusted v0.9.0
   Compiling getrandom v0.2.15
   Compiling ring v0.17.8
The following warnings were emitted during compilation:

warning: bwrap: Can't find source path /home/tomas/sccache-things/build/builds/9be21159c4f51686d7cba248dd8b3e21fc751df36ad9d5e0b93f9a1c819f1fbb-81/target: Permission denied

error: failed to run custom build command for `ring v0.17.8`

Caused by:
  process didn't exit successfully: `/home/tomas/dev/example/target/debug/build/ring-651d868a799b2276/build-script-build` (exit status: 1)
  --- stdout
  cargo:rerun-if-env-changed=RING_PREGENERATE_ASM
  cargo:rustc-env=RING_CORE_PREFIX=ring_core_0_17_8_
  OPT_LEVEL = Some("0")
  TARGET = Some("x86_64-unknown-linux-gnu")
  HOST = Some("x86_64-unknown-linux-gnu")
  cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
  CC_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
  CC_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=HOST_CC
  HOST_CC = None
  cargo:rerun-if-env-changed=CC
  CC = None
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("true")
  CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2")
  cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
  CFLAGS_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
  CFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=HOST_CFLAGS
  HOST_CFLAGS = None
  cargo:rerun-if-env-changed=CFLAGS
  CFLAGS = None
  sccache: Compiler killed by signal 1
  cargo:warning=bwrap: Can't find source path /home/tomas/sccache-things/build/builds/9be21159c4f51686d7cba248dd8b3e21fc751df36ad9d5e0b93f9a1c819f1fbb-81/target: Permission denied

  --- stderr


  error occurred: Command "sccache" "cc" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-gdwarf-4" "-fno-omit-frame-pointer" "-m64" "-I" "include" "-I" "/home/tomas/dev/example/target/debug/build/ring-db0ed0b75b1b5dd9/out" "-Wall" "-Wextra" "-fvisibility=hidden" "-std=c1x" "-Wall" "-Wbad-function-cast" "-Wcast-align" "-Wcast-qual" "-Wconversion" "-Wmissing-field-initializers" "-Wmissing-include-dirs" "-Wnested-externs" "-Wredundant-decls" "-Wshadow" "-Wsign-compare" "-Wsign-conversion" "-Wstrict-prototypes" "-Wundef" "-Wuninitialized" "-g3" "-DNDEBUG" "-o" "/home/tomas/dev/example/target/debug/build/ring-db0ed0b75b1b5dd9/out/fad98b632b8ce3cc-curve25519.o" "-c" "crypto/curve25519/curve25519.c" with args cc did not execute successfully (status code exit status: 254).

same for --release build. All with stable rust. All the other(rather many) crates seem to compile successfully in my large project