diff --git a/lib/binding_web/exports.json b/lib/binding_web/exports.json
index b51a4cb3..55f52e96 100644
--- a/lib/binding_web/exports.json
+++ b/lib/binding_web/exports.json
@@ -5,7 +5,6 @@
   "_realloc",
 
   "__ZNKSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE4copyEPcmm",
-  "__ZNKSt3__220__vector_base_commonILb1EE20__throw_length_errorEv",
   "__ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEPKcm",
   "__ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE7reserveEm",
   "__ZNSt3__212basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE9__grow_byEmmmmmm",
diff --git a/script/build-wasm b/script/build-wasm
index 19c7aa13..12852583 100755
--- a/script/build-wasm
+++ b/script/build-wasm
@@ -89,6 +89,7 @@ $emcc                                            \
   -s NODEJS_CATCH_REJECTION=0                    \
   -s EXPORTED_FUNCTIONS=@${web_dir}/exports.json \
   $emscripten_flags                              \
+  -fno-exceptions                                \
   -std=c99                                       \
   -D 'fprintf(...)='                             \
   -D NDEBUG=                                     \
diff --git a/script/fetch-emscripten b/script/fetch-emscripten
index 4b579df0..6f352840 100755
--- a/script/fetch-emscripten
+++ b/script/fetch-emscripten
@@ -20,15 +20,15 @@ EMSDK_DIR="./target/emsdk"
   git pull
   ./emsdk list
 
-  echo 'Installing latest emscripten...'
+  echo 'Installing emscripten...'
   ./emsdk install $EMSCRIPTEN_VERSION
 
-  echo 'Activating latest emscripten...'
+  echo 'Activating emscripten...'
   ./emsdk activate $EMSCRIPTEN_VERSION
 ) >&2
 
 (
   source "$EMSDK_DIR/emsdk_env.sh" > /dev/null
   emcc --version >&2
-  declare -px
+  echo export $(env | egrep '^(PATH|EM.*)')
 )