diff --git a/osx/build-ruby b/osx/build-ruby
index a882814..8887b87 100755
--- a/osx/build-ruby
+++ b/osx/build-ruby
@@ -237,6 +237,9 @@ export PATH="$RUNTIME_DIR/bin:$PATH"
 export LIBRARY_PATH="$RUNTIME_DIR/lib"
 export DYLD_FALLBACK_LIBRARY_PATH="$RUNTIME_DIR/lib"
 export PKG_CONFIG_PATH="$RUNTIME_DIR/lib/pkgconfig:/usr/lib/pkgconfig"
+export CCACHE_DIR="$RUNTIME_DIR/ccache"
+export CCACHE_COMPRESS=1
+export CCACHE_COMPRESS_LEVEL=3
 export RUNTIME_DIR
 export TMPBUILDROOT
 export DEAD_STRIP=false
diff --git a/osx/internal/bin/c++ b/osx/internal/bin/c++
index 5f2ddf9..71689b7 100755
--- a/osx/internal/bin/c++
+++ b/osx/internal/bin/c++
@@ -1,8 +1,12 @@
 #!/bin/bash
 set -e
+CXX=(/usr/bin/c++)
 ARGS=()
 REGEX='(^| )-c( |$)'
 
+if [[ "$RUNTIME_DIR" != "" && -e "$RUNTIME_DIR/bin/ccache" ]]; then
+	CXX=("$RUNTIME_DIR/bin/ccache" /usr/bin/c++)
+fi
 if [[ "$DEAD_STRIP" != "" ]] && $DEAD_STRIP; then
 	ARGS+=(-Wl,-dead_strip)
 fi
@@ -10,10 +14,10 @@ if [[ "$@" =~ $REGEX ]]; then
 	if [[ "$RUNTIME_DIR" != "" ]]; then
 		ARGS+=("-I$RUNTIME_DIR/include")
 	fi
-	exec /usr/bin/c++ "${ARGS[@]}" "$@"
+	exec "${CXX[@]}" "${ARGS[@]}" "$@"
 else
 	if [[ "$RUNTIME_DIR" != "" ]]; then
 		ARGS+=("-L$RUNTIME_DIR/lib")
 	fi
-	exec /usr/bin/c++ -Wl,-headerpad_max_install_names "${ARGS[@]}" "$@"
+	exec "${CXX[@]}" -Wl,-headerpad_max_install_names "${ARGS[@]}" "$@"
 fi
diff --git a/osx/internal/bin/cc b/osx/internal/bin/cc
index 22327fb..4f583b6 100755
--- a/osx/internal/bin/cc
+++ b/osx/internal/bin/cc
@@ -1,8 +1,12 @@
 #!/bin/bash
 set -e
+CC=(/usr/bin/cc)
 ARGS=()
 REGEX='(^| )-c( |$)'
 
+if [[ "$RUNTIME_DIR" != "" && -e "$RUNTIME_DIR/bin/ccache" ]]; then
+	CC=("$RUNTIME_DIR/bin/ccache" /usr/bin/cc)
+fi
 if [[ "$DEAD_STRIP" != "" ]] && $DEAD_STRIP; then
 	ARGS+=(-Wl,-dead_strip)
 fi
@@ -10,10 +14,10 @@ if [[ "$@" =~ $REGEX ]]; then
 	if [[ "$RUNTIME_DIR" != "" ]]; then
 		ARGS+=("-I$RUNTIME_DIR/include")
 	fi
-	exec /usr/bin/cc "${ARGS[@]}" "$@"
+	exec "${CC[@]}" "${ARGS[@]}" "$@"
 else
 	if [[ "$RUNTIME_DIR" != "" ]]; then
 		ARGS+=("-L$RUNTIME_DIR/lib")
 	fi
-	exec /usr/bin/cc -Wl,-headerpad_max_install_names "${ARGS[@]}" "$@"
+	exec "${CC[@]}" -Wl,-headerpad_max_install_names "${ARGS[@]}" "$@"
 fi
diff --git a/osx/setup-runtime b/osx/setup-runtime
index 7d1ba57..3ba116d 100755
--- a/osx/setup-runtime
+++ b/osx/setup-runtime
@@ -10,6 +10,8 @@ TEMPDIR=
 
 RUNTIME_DIR=
 CONCURRENCY=4
+FORCE_CCACHE=false
+SKIP_CCACHE=false
 FORCE_CMAKE=false
 SKIP_CMAKE=false
 FORCE_PKG_CONFIG=false
@@ -191,7 +193,9 @@ RUNTIME_DIR="`cd \"$RUNTIME_DIR\" && pwd`"
 #######################################
 
 
+TOTAL_TOOLS=3
 TOTAL_LIBS=12
+CCACHE_VERSION=3.2.1
 CMAKE_VERSION=3.0.2
 PKG_CONFIG_VERSION=0.28
 OPENSSL_VERSION=1.0.1l
@@ -219,11 +223,36 @@ export DEAD_STRIP=true
 
 header "Initializing..."
 run mkdir -p "$RUNTIME_DIR"
+run mkdir -p "$RUNTIME_DIR/ccache"
+export CCACHE_DIR="$RUNTIME_DIR/ccache"
+export CCACHE_COMPRESS=1
+export CCACHE_COMPRESS_LEVEL=3
 echo "Entering $RUNTIME_DIR"
 cd "$RUNTIME_DIR"
 echo
 
-header "Installing CMake..."
+header "Installing tool 1/$TOTAL_TOOLS: ccache..."
+if $SKIP_CCACHE; then
+	echo "Skipped."
+elif [[ ! -e "$RUNTIME_DIR/bin/ccache" ]] || $FORCE_CCACHE; then
+	download_and_extract ccache-$CCACHE_VERSION.tar.gz \
+		http://samba.org/ftp/ccache/ccache-$CCACHE_VERSION.tar.gz
+	echo "Entering $RUNTIME_DIR/cmake-$CMAKE_VERSION"
+	pushd ccache-$CCACHE_VERSION >/dev/null
+
+	run ./configure --prefix="$RUNTIME_DIR"
+	run make -j$CONCURRENCY
+	run make install
+
+	echo "Leaving source directory"
+	popd >/dev/null
+	run rm -rf ccache-$CCACHE_VERSION
+else
+	echo "Already installed."
+fi
+echo
+
+header "Installing tool 2/$TOTAL_TOOLS: CMake..."
 if $SKIP_CMAKE; then
 	echo "Skipped."
 elif [[ ! -e "$RUNTIME_DIR/bin/cmake" ]] || $FORCE_CMAKE; then
@@ -244,7 +273,7 @@ else
 fi
 echo
 
-header "Installing pkg-config..."
+header "Installing tool 3/$TOTAL_TOOLS: pkg-config..."
 if $SKIP_PKG_CONFIG; then
 	echo "Skipped."
 elif [[ ! -e "$RUNTIME_DIR/bin/pkg-config" ]] || $FORCE_PKG_CONFIG; then
diff --git a/windows/build-ruby b/windows/build-ruby
index 4df7e5e..31991f4 100755
--- a/windows/build-ruby
+++ b/windows/build-ruby
@@ -147,8 +147,8 @@ header "Extracting Ruby..."
 if [[ $? != 0 ]]; then
 	exit 1
 fi
-run mv "$OUTPUT_DIR/ruby-$RUBY_VERSION-$RUBY_ARCH-mingw32"/* "$OUTPUT_DIR/"
-run rm -rf "$OUTPUT_DIR/ruby-$RUBY_VERSION-$RUBY_ARCH-mingw32"
+run mv "$OUTPUT_DIR/ruby-$RUBY_VERSION-$RUBY_FILE_ARCH-mingw32"/* "$OUTPUT_DIR/"
+run rm -rf "$OUTPUT_DIR/ruby-$RUBY_VERSION-$RUBY_FILE_ARCH-mingw32"
 echo