diff --git a/build-compiler-rt.sh b/build-compiler-rt.sh
index 04b55c5..aaac17e 100755
--- a/build-compiler-rt.sh
+++ b/build-compiler-rt.sh
@@ -22,7 +22,7 @@ fi
 
 mkdir -p "$PREFIX"
 PREFIX="$(cd "$PREFIX" && pwd)"
-export PATH=$PREFIX/bin:$PATH
+export PATH="$PREFIX/bin:$PATH"
 
 : ${CORES:=$(nproc 2>/dev/null)}
 : ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}
diff --git a/build-libcxx.sh b/build-libcxx.sh
index 8965462..877d412 100755
--- a/build-libcxx.sh
+++ b/build-libcxx.sh
@@ -27,7 +27,7 @@ fi
 mkdir -p "$PREFIX"
 PREFIX="$(cd "$PREFIX" && pwd)"
 
-export PATH=$PREFIX/bin:$PATH
+export PATH="$PREFIX/bin:$PATH"
 
 : ${CORES:=$(nproc 2>/dev/null)}
 : ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}
diff --git a/build-libssp.sh b/build-libssp.sh
index 71c4b2a..e5e4c06 100755
--- a/build-libssp.sh
+++ b/build-libssp.sh
@@ -9,7 +9,7 @@ fi
 PREFIX="$1"
 mkdir -p "$PREFIX"
 PREFIX="$(cd "$PREFIX" && pwd)"
-export PATH=$PREFIX/bin:$PATH
+export PATH="$PREFIX/bin:$PATH"
 
 : ${CORES:=$(nproc 2>/dev/null)}
 : ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}
diff --git a/build-mingw-w64-libraries.sh b/build-mingw-w64-libraries.sh
index 025c3d3..debda04 100755
--- a/build-mingw-w64-libraries.sh
+++ b/build-mingw-w64-libraries.sh
@@ -9,7 +9,7 @@ fi
 PREFIX="$1"
 mkdir -p "$PREFIX"
 PREFIX="$(cd "$PREFIX" && pwd)"
-export PATH=$PREFIX/bin:$PATH
+export PATH="$PREFIX/bin:$PATH"
 
 : ${CORES:=$(nproc 2>/dev/null)}
 : ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}
diff --git a/build-mingw-w64.sh b/build-mingw-w64.sh
index 51826c2..4d3cbe2 100755
--- a/build-mingw-w64.sh
+++ b/build-mingw-w64.sh
@@ -37,7 +37,7 @@ PREFIX="$(cd "$PREFIX" && pwd)"
 ORIGPATH="$PATH"
 if [ -z "$HOST" ]; then
     # The newly built toolchain isn't crosscompiled; add it to the path.
-    export PATH=$PREFIX/bin:$PATH
+    export PATH="$PREFIX/bin:$PATH"
 else
     # Crosscompiling the toolchain itself; the cross compiler is
     # expected to already be in $PATH.
@@ -137,7 +137,7 @@ fi
 # If building on windows, we've installed prefixless wrappers - these break
 # building widl, as the toolchain isn't functional yet. Restore the original
 # path.
-export PATH=$ORIGPATH
+export PATH="$ORIGPATH"
 cd mingw-w64-tools/widl
 for arch in $ARCHS; do
     mkdir -p build-$CROSS_NAME$arch