diff --git a/example/web/build-tdlib.sh b/example/web/build-tdlib.sh
index 6223d445..4817270e 100755
--- a/example/web/build-tdlib.sh
+++ b/example/web/build-tdlib.sh
@@ -1,5 +1,11 @@
+#!/bin/sh
+
 emconfigure || { echo 'emconfigure not found. Install Emscripten and add emconfigure to PATH environment variable'; exit 1; }
 
+rm -rf build/generate
+rm -rf build/asmjs
+rm -rf build/wasm
+
 mkdir -p build/generate
 mkdir -p build/asmjs
 mkdir -p build/wasm
@@ -20,12 +26,12 @@ OPENSSL_OPTIONS="-DOPENSSL_FOUND=1 \
 
 pushd .
 cd build/wasm
-eval emconfigure cmake $TD_ROOT -GNinja $OPENSSL_OPTIONS || exit 1
+eval emconfigure cmake $TD_ROOT $OPENSSL_OPTIONS || exit 1
 popd
 
 pushd .
 cd build/asmjs
-eval emconfigure cmake $TD_ROOT -GNinja -DASMJS=1 $OPENSSL_OPTIONS || exit 1
+eval emconfigure cmake $TD_ROOT $OPENSSL_OPTIONS -DASMJS=1 || exit 1
 popd
 
 pushd .
@@ -33,6 +39,9 @@ cd build/generate
 cmake $TD_ROOT -GNinja || exit 1
 popd
 
-cmake --build build/generate -j --target prepare_cross_compiling || exit 1
-cmake --build build/wasm -j --target td_wasm || exit 1
-cmake --build build/asmjs -j --target td_asmjs || exit 1
+echo "Generating TDLib autogenerated source files..."
+cmake --build build/generate --target prepare_cross_compiling || exit 1
+echo "Building TDLib to WebAssembly..."
+cmake --build build/wasm --target td_wasm || exit 1
+echo "Building TDLib to asm.js..."
+cmake --build build/asmjs --target td_asmjs || exit 1
diff --git a/example/web/build-tdweb.sh b/example/web/build-tdweb.sh
index a899adf3..a32c3628 100755
--- a/example/web/build-tdweb.sh
+++ b/example/web/build-tdweb.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 pushd .
 cd tdweb
 npm install || exit 1
diff --git a/example/web/copy-tdlib.sh b/example/web/copy-tdlib.sh
index 5e4ca131..f63dfeb5 100755
--- a/example/web/copy-tdlib.sh
+++ b/example/web/copy-tdlib.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 DEST=tdweb/src/prebuilt/release/
 mkdir -p $DEST
 cp build/wasm/td_wasm.{js,wasm} $DEST