diff --git a/.cargo/config.toml b/.cargo/config.toml
index 95be821..d2be771 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -59,7 +59,7 @@
         "-Clinker-plugin-lto",
         "-Clink-arg=-fuse-ld=mold",
         "-Clink-arg=-flto",
-        "-Zpre-link-args=link_libs/mimalloc.o",
+        "-Zpre-link-args=target/link_libs/mimalloc.o",
     ]
 
 
@@ -71,6 +71,7 @@
 
 # Frontend of program
 [target.wasm32-unknown-unknown]
+    linker="wasm-ld"
     rustflags=[
         "-Clink-arg=--max-memory=4294967296",
         "-Ctarget-feature=+atomics,+simd128",
diff --git a/build_mimalloc.sh b/build_mimalloc.sh
index 64d0d70..cfe2fb4 100755
--- a/build_mimalloc.sh
+++ b/build_mimalloc.sh
@@ -9,30 +9,50 @@ set -eu
 # If none is supplied, use the default "2.2.7".
 MIMALLOC_VERSION=${1:-2.2.7}
 
-# Fetch mimalloc source files
-curl -f -L --retry 5 https://github.com/microsoft/mimalloc/archive/refs/tags/v$MIMALLOC_VERSION.tar.gz | tar xz
+ROOT="target"
+MI_PATH="$ROOT/mimalloc-$MIMALLOC_VERSION"
+OUT_PATH="$MI_PATH/out"
+OBJECT="mimalloc.o"
+OUT_OBJECT="$OUT_PATH/$OBJECT"
+LINK_LIBS="$ROOT/link_libs"
 
-cd mimalloc-$MIMALLOC_VERSION
 
-mkdir out
+if [[ -e $OUT_OBJECT ]]; then
+    echo "Mimalloc v$MIMALLOC_VERSION already installed"
+    exit 0
+fi
+
+mkdir -p "$ROOT"
+
+if [[ ! -d "$MI_PATH" ]]; then
+    cd "$ROOT"
+
+    # Fetch mimalloc source files
+    echo "Downloading mimalloc v$MIMALLOC_VERSION source files"
+    curl -f -L --retry 5 https://github.com/microsoft/mimalloc/archive/refs/tags/v$MIMALLOC_VERSION.tar.gz | tar xz
+
+    cd ..
+fi
+
+
+mkdir -p "$OUT_PATH"
 
 # Create mimalloc build files with the following settings
-cmake -Bout -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=clang \
+cmake -B"$OUT_PATH" -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=clang \
     -DMI_SECURE=OFF \
     -DMI_BUILD_OBJECT=ON \
     -DMI_BUILD_TESTS=OFF \
     -DMI_DEBUG_FULL=OFF \
     -DMI_LIBC_MUSL=ON \
     -G Ninja \
-    .
+    "$MI_PATH"
 
 # Build mimalloc
-cmake --build out
-
-cd ..
+cmake --build "$OUT_PATH"
 
 # Create directory if it doesn't already exist
-mkdir -p link_libs
+mkdir -p "$LINK_LIBS"
 
 # Create a copy of mimalloc. Used to prelink mimalloc in .cargo/config.toml
-cp -f mimalloc-$MIMALLOC_VERSION/out/mimalloc.o link_libs/mimalloc.o
\ No newline at end of file
+echo "Copying $OUT_OBJECT  -->  $LINK_LIBS/$OBJECT"
+cp -f "$OUT_OBJECT" $LINK_LIBS/$OBJECT
\ No newline at end of file