diff --git a/projects/kimageformats/Dockerfile b/projects/kimageformats/Dockerfile
index 3c3be1958..e3e04567c 100644
--- a/projects/kimageformats/Dockerfile
+++ b/projects/kimageformats/Dockerfile
@@ -22,7 +22,6 @@ RUN git clone --depth 1 https://invent.kde.org/frameworks/extra-cmake-modules.gi
 RUN git clone --depth 1 --branch=5.15 git://code.qt.io/qt/qtbase.git
 RUN git clone --depth 1 https://invent.kde.org/frameworks/karchive.git
 RUN git clone --depth 1 https://invent.kde.org/frameworks/kimageformats.git
-RUN apt-get install --yes yasm
 RUN git clone --depth 1 -b v2.0.1 https://aomedia.googlesource.com/aom
 RUN git clone --depth 1 -b v0.8.4 https://github.com/AOMediaCodec/libavif.git
 COPY build.sh $SRC
diff --git a/projects/kimageformats/build.sh b/projects/kimageformats/build.sh
index d650c9855..ce1ee7185 100644
--- a/projects/kimageformats/build.sh
+++ b/projects/kimageformats/build.sh
@@ -53,7 +53,7 @@ cd $SRC
 cd aom
 mkdir build.libavif
 cd build.libavif
-cmake -DBUILD_SHARED_LIBS=0 -DENABLE_DOCS=0 -DENABLE_EXAMPLES=0 -DENABLE_TESTDATA=0 -DENABLE_TESTS=0 -DENABLE_TOOLS=0 -DCONFIG_PIC=1 ..
+cmake -DBUILD_SHARED_LIBS=0 -DENABLE_DOCS=0 -DENABLE_EXAMPLES=0 -DENABLE_TESTDATA=0 -DENABLE_TESTS=0 -DENABLE_TOOLS=0 -DCONFIG_PIC=1 -DAOM_TARGET_CPU=generic ..
 make -j$(nproc)
 
 cd $SRC
@@ -61,7 +61,7 @@ ln -s "$SRC/aom" "$SRC/libavif/ext/"
 cd libavif
 mkdir build
 cd build
-CFLAGS="-fPIC" cmake -DBUILD_SHARED_LIBS=OFF -DAVIF_ENABLE_WERROR=OFF -DAVIF_CODEC_AOM=ON -DAVIF_LOCAL_AOM=ON ..
+CFLAGS="$CFLAGS -fPIC" cmake -DBUILD_SHARED_LIBS=OFF -DAVIF_ENABLE_WERROR=OFF -DAVIF_CODEC_AOM=ON -DAVIF_LOCAL_AOM=ON ..
 make -j$(nproc)
 
 cd $SRC