diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8acbc0888..48b9a537f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -56,10 +56,10 @@ jobs:
           paths:
             - boost_1_68_0
       - store_artifacts:
-          path: build/libsolc/soljson.js
+          path: emscripten_build/libsolc/soljson.js
           destination: soljson.js
       - run: mkdir -p workspace
-      - run: cp build/libsolc/soljson.js workspace/soljson.js
+      - run: cp emscripten_build/libsolc/soljson.js workspace/soljson.js
       - run: scripts/get_version.sh > workspace/version.txt
       - persist_to_workspace:
           root: workspace
diff --git a/.gitignore b/.gitignore
index e0f010d34..62ddd1af0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,6 +32,7 @@ prerelease.txt
 
 # Build directory
 build/
+emscripten_build/
 docs/_build
 docs/utils/__pycache__
 docs/utils/*.pyc
diff --git a/scripts/build_emscripten.sh b/scripts/build_emscripten.sh
index 2a670daf1..25f6f7f8c 100755
--- a/scripts/build_emscripten.sh
+++ b/scripts/build_emscripten.sh
@@ -28,7 +28,13 @@
 
 set -e
 
+if test -z "$1"; then
+	BUILD_DIR="emscripten_build"
+else
+	BUILD_DIR="$1"
+fi
+
 docker run -v $(pwd):/root/project -w /root/project trzeci/emscripten:sdk-tag-1.38.22-64bit \
     ./scripts/travis-emscripten/install_deps.sh
 docker run -v $(pwd):/root/project -w /root/project trzeci/emscripten:sdk-tag-1.38.22-64bit \
-    ./scripts/travis-emscripten/build_emscripten.sh
+    ./scripts/travis-emscripten/build_emscripten.sh $BUILD_DIR
diff --git a/scripts/bytecodecompare/storebytecode.sh b/scripts/bytecodecompare/storebytecode.sh
index 4208d67ff..b7f562621 100755
--- a/scripts/bytecodecompare/storebytecode.sh
+++ b/scripts/bytecodecompare/storebytecode.sh
@@ -29,6 +29,12 @@ set -e
 
 REPO_ROOT="$(dirname "$0")"/../..
 
+if test -z "$1"; then
+	BUILD_DIR="build"
+else
+	BUILD_DIR="$1"
+fi
+
 echo "Compiling all test contracts into bytecode..."
 TMPDIR=$(mktemp -d)
 (
@@ -43,7 +49,7 @@ TMPDIR=$(mktemp -d)
         # npm install solc
         git clone --depth 1 https://github.com/ethereum/solc-js.git solc-js
         ( cd solc-js; npm install )
-        cp "$REPO_ROOT/build/libsolc/soljson.js" solc-js/
+        cp "$REPO_ROOT/emscripten_build/libsolc/soljson.js" solc-js/
         cat > solc <<EOF
 #!/usr/bin/env node
 var process = require('process')
@@ -93,7 +99,7 @@ EOF
         chmod +x solc
         ./solc *.sol > report.txt
     else
-        $REPO_ROOT/scripts/bytecodecompare/prepare_report.py $REPO_ROOT/build/solc/solc
+        $REPO_ROOT/scripts/bytecodecompare/prepare_report.py $REPO_ROOT/$BUILD_DIR/solc/solc
     fi
 
     if [ "$TRAVIS_SECURE_ENV_VARS" = "true" ]
diff --git a/scripts/test_emscripten.sh b/scripts/test_emscripten.sh
index 1804f23a1..783a64065 100755
--- a/scripts/test_emscripten.sh
+++ b/scripts/test_emscripten.sh
@@ -28,8 +28,14 @@
 
 set -e
 
+if test -z "$1"; then
+	BUILD_DIR="emscripten_build"
+else
+	BUILD_DIR="$1"
+fi
+
 REPO_ROOT=$(cd $(dirname "$0")/.. && pwd)
-SOLJSON="$REPO_ROOT/build/libsolc/soljson.js"
+SOLJSON="$REPO_ROOT/$BUILD_DIR/libsolc/soljson.js"
 VERSION=$("$REPO_ROOT"/scripts/get_version.sh)
 
 echo "Running solcjs tests...."
diff --git a/scripts/travis-emscripten/build_emscripten.sh b/scripts/travis-emscripten/build_emscripten.sh
index 0b6c53462..5b5540b6d 100755
--- a/scripts/travis-emscripten/build_emscripten.sh
+++ b/scripts/travis-emscripten/build_emscripten.sh
@@ -34,6 +34,12 @@
 
 set -ev
 
+if test -z "$1"; then
+	BUILD_DIR="emscripten_build"
+else
+	BUILD_DIR="$1"
+fi
+
 if ! type git &>/dev/null; then
     # We need git for extracting the commit hash
     apt-get update
@@ -76,8 +82,8 @@ echo -en 'travis_fold:end:install_cmake.sh\\r'
 # Build dependent components and solidity itself
 echo -en 'travis_fold:start:compiling_solidity\\r'
 cd $WORKSPACE
-mkdir -p build
-cd build
+mkdir -p $BUILD_DIR
+cd $BUILD_DIR
 cmake \
   -DCMAKE_TOOLCHAIN_FILE=../cmake/toolchains/emscripten.cmake \
   -DCMAKE_BUILD_TYPE=Release \
@@ -97,9 +103,9 @@ make -j 4
 cd ..
 mkdir -p upload
 # Patch soljson.js to provide backwards-compatibility with older emscripten versions
-echo ";/* backwards compatibility */ Module['Runtime'] = Module;" >> build/libsolc/soljson.js
-cp build/libsolc/soljson.js upload/
-cp build/libsolc/soljson.js ./
+echo ";/* backwards compatibility */ Module['Runtime'] = Module;" >> $BUILD_DIR/libsolc/soljson.js
+cp $BUILD_DIR/libsolc/soljson.js upload/
+cp $BUILD_DIR/libsolc/soljson.js ./
 
 OUTPUT_SIZE=`ls -la soljson.js`