diff --git a/.bazelrc b/.bazelrc
index 62e363e5..afba0858 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -201,7 +201,7 @@ build:asan --copt='-fsanitize=address'
 build:asan --copt='-fsanitize-address-use-after-return=always'
 build:asan --copt='-fsanitize-address-use-after-scope'
 build:asan --linkopt='-fsanitize=address'
-build:asan --action_env=ASAN_OPTIONS=color=always:detect_leaks=1:strict_string_checks=1:check_initialization_order=1:strict_init_order=1
+build:asan --action_env=ASAN_OPTIONS=color=always:detect_leaks=1:strict_string_checks=1:check_initialization_order=1:strict_init_order=1:external_symbolizer_path=/nix/store/643f0y8q5yfzrqq4kn56dc13xvz90srv-llvm-16.0.1/bin/llvm-symbolizer
 build:asan --action_env=LSAN_OPTIONS=report_objects=1
 build:asan --test_tag_filters=-haskell
 build:asan --build_tag_filters=-haskell
@@ -218,7 +218,7 @@ build:msan --per_file_copt='//toxic[:/]@-UAUDIO,-UVIDEO,-UPYTHON'
 build:tsan --config=sanitizer
 build:tsan --copt='-fsanitize=thread'
 build:tsan --linkopt='-fsanitize=thread'
-build:tsan --test_env=TSAN_OPTIONS=color=always,history_size=7,force_seq_cst_atomics=1
+build:tsan --test_env=TSAN_OPTIONS=color=always,history_size=7,force_seq_cst_atomics=1:external_symbolizer_path=/nix/store/643f0y8q5yfzrqq4kn56dc13xvz90srv-llvm-16.0.1/bin/llvm-symbolizer
 
 build:ubsan --config=sanitizer
 build:ubsan --copt='-fno-sanitize-recover=all'
@@ -228,7 +228,7 @@ build:ubsan --linkopt='-fsanitize=integer,nullability,undefined'
 # https://github.com/bazelbuild/bazel/issues/11122
 build:ubsan --linkopt='-fsanitize-link-c++-runtime'
 build:ubsan --per_file_copt='//c-toxcore[:/]@-D_DEBUG'
-build:ubsan --test_env=UBSAN_OPTIONS=color=always,print_stacktrace=1
+build:ubsan --test_env=UBSAN_OPTIONS=color=always,print_stacktrace=1:external_symbolizer_path=/nix/store/643f0y8q5yfzrqq4kn56dc13xvz90srv-llvm-16.0.1/bin/llvm-symbolizer
 
 # Link-time optimization.
 build:lto --copt='-flto'
diff --git a/dockerfiles b/dockerfiles
index efe4d64c..b2854e60 160000
--- a/dockerfiles
+++ b/dockerfiles
@@ -1 +1 @@
-Subproject commit efe4d64c5e2c3a885e5ebfa5623bfce669ace10e
+Subproject commit b2854e60f8c10ee20872543253a0b1b7a0ebf9a7