diff --git a/pkgmk b/pkgmk
index 8fe3ce0..f35ada6 100755
--- a/pkgmk
+++ b/pkgmk
@@ -326,9 +326,10 @@ unpack_source() {
 		__LOCAL_FILENAME=$(get_filename "$__FILE")
 
 		case $__LOCAL_FILENAME in
-		*.tar  | *.tar.gz | *.tar.Z | *.tgz      | *.tar.bz2 | \
-		*.tbz2 | *.tar.xz | *.txz   | *.tar.lzma | *.tar.lz  | \
-		*.zip  | *.rpm    | *.7z    | *.zst                    )
+		*.tar     | *.tar.gz | *.tar.Z | *.tgz      | *.tar.bz2 | \
+		*.tbz2    | *.tar.xz | *.txz   | *.tar.lzma | *.tar.lz  | \
+		*.tar.zst | *.tzst   | *.zst   | *.zip      | *.rpm     | \
+		*.7z)
 			# -p: preserve file permissions
 			# -o: use the user and group of the user
 			#     running the program rather than those