diff --git a/packages/ponylang/0.39.0/build.sh b/packages/ponylang/0.39.0/build.sh
index 8985661..1221f82 100755
--- a/packages/ponylang/0.39.0/build.sh
+++ b/packages/ponylang/0.39.0/build.sh
@@ -5,12 +5,16 @@ PREFIX=$(realpath $(dirname $0))
 # get sources
 curl -OL "https://github.com/ponylang/ponyc/archive/refs/tags/0.39.0.tar.gz"
 tar xfz 0.39.0.tar.gz
+rm 0.39.0.tar.gz
+
+# cd into pony dir that was created from tar extraction.
+cd 0.39.0
 
 # Build the vendored LLVM libraries that are included in the `lib/llvm/src`.
 make libs build_flags="-j$(nproc)"
 # Configure the CMake build directory.
 make configure
-# Will build ponyc and put it in `build/release`.
+# Will build pony and put it in `build/release`.
 make build
-# Install ponyc into `$PREFIX`.
+# Install pony into `$PREFIX`.
 make prefix="$PREFIX" install