diff --git a/assimp/.signature b/assimp/.signature
index 941ce1a04..975eb1f9e 100644
--- a/assimp/.signature
+++ b/assimp/.signature
@@ -1,5 +1,5 @@
 untrusted comment: verify with /etc/ports/contrib.pub
-RWSagIOpLGJF39webbkVoljJAWEoQ1wfIeVcmlYPz11BKLY+gaOFTOs0uq9LsZ8TAImezDZdvlH0oMxKC3kfymfENyplRt7tTwc=
-SHA256 (Pkgfile) = 308d818fae4d70b4a01fa841cbf907f3a173d35a8727a4d7fdc9eb226cae1152
+RWSagIOpLGJF3/SWdYIZJ+fZvy4Tr9WCA2SzuFordOqSazGEtZxTAJ3YLkn5MA8z9Wqujqwb631I/IQY1qoHt31pbXsxjR08kAY=
+SHA256 (Pkgfile) = 3a6f60dd27ffbb601c4fd1d96c234856db74a6083c8c7f1da9769ca08d831fb0
 SHA256 (.footprint) = 006eb35ba7faf1ce46e788bb5a0bbad23c946882605be017713b918aff8d875b
 SHA256 (assimp-5.0.1.tar.gz) = 11310ec1f2ad2cd46b95ba88faca8f7aaa1efe9aa12605c55e3de2b977b3dbfc
diff --git a/assimp/Pkgfile b/assimp/Pkgfile
index c47ea1854..648a54cc9 100644
--- a/assimp/Pkgfile
+++ b/assimp/Pkgfile
@@ -9,7 +9,8 @@ release=1
 source=(https://github.com/assimp/assimp/archive/v$version/$name-$version.tar.gz)
 
 build() {
-  cmake -S$name-$version -Bbuild \
+  [[ -e /usr/bin/ninja ]] && PKGMK_ASSIMP_OPTIONS=' -GNinja'
+  cmake -S$name-$version -Bbuild $PKGMK_ASSIMP_OPTIONS \
     -DCMAKE_INSTALL_PREFIX=/usr \
     -DCMAKE_BUILD_TYPE=Release \
     -DASSIMP_BUILD_SAMPLES=OFF