---
 build | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/build b/build
index 01df883a4..1d646840b 100755
--- a/build
@@ -13,10 +13,22 @@ TARGET_OS_AND_ABI=${TARGET#*-} # Example: linux-gnu
 
 # Here we map the OS from the target triple to the value that CMake expects.
 TARGET_OS_CMAKE=${TARGET_OS_AND_ABI%-*} # Example: linux
-TARGET_OS_CMAKE="${TARGET_OS_CMAKE/macos/Darwin}"
-TARGET_OS_CMAKE="${TARGET_OS_CMAKE/freebsd/FreeBSD}"
-TARGET_OS_CMAKE="${TARGET_OS_CMAKE/windows/Windows}"
-TARGET_OS_CMAKE="${TARGET_OS_CMAKE/linux/Linux}"
+if [ "$TARGET_OS_CMAKE" = "macos" ]
+then
+	TARGET_OS_CMAKE=Darwin
+fi
+if [ "$TARGET_OS_CMAKE" = "freebsd" ]
+then
+	TARGET_OS_CMAKE=FreeBSD
+fi
+if [ "$TARGET_OS_CMAKE" = "windows" ]
+then
+	TARGET_OS_CMAKE=Windows
+fi
+if [ "$TARGET_OS_CMAKE" = "linux" ]
+then
+	TARGET_OS_CMAKE=Linux
+fi
 
 # First build the libraries for Zig to link against, as well as native `llvm-tblgen`.
 mkdir -p "$ROOTDIR/out/build-llvm-host"
-- 
2.28.0