diff --git a/graphics/brlcad/brlcad-skip-gstep.patch b/graphics/brlcad/brlcad-skip-gstep.patch
deleted file mode 100644
index 5768ad63a25..00000000000
--- a/graphics/brlcad/brlcad-skip-gstep.patch
+++ /dev/null
@@ -1,12 +0,0 @@
---- a/db/nist/CMakeLists.txt
-+++ b/db/nist/CMakeLists.txt
-@@ -10,7 +10,8 @@ set(NIST_SAMPLE_MODELS
- )
- 
- foreach(im ${NIST_SAMPLE_MODELS})
--  ADD_G_TARGET(${im} "BRL-CAD Geometry Models/Sample")
-+#  disabled because this often segfaults
-+#  ADD_G_TARGET(${im} "BRL-CAD Geometry Models/Sample")
- endforeach(im ${NIST_SAMPLE_MODELS})
- 
- CMAKEFILES(
diff --git a/graphics/brlcad/brlcad.SlackBuild b/graphics/brlcad/brlcad.SlackBuild
index 47795622176..a7c1cb4fa69 100644
--- a/graphics/brlcad/brlcad.SlackBuild
+++ b/graphics/brlcad/brlcad.SlackBuild
@@ -15,7 +15,7 @@
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=brlcad
-VERSION=${VERSION:-7.38.2}
+VERSION=${VERSION:-7.42.0}
 SRCVER=rel-${VERSION//./-}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
@@ -75,18 +75,17 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+
 
-# thanks arch maintainers.
-# fixes build on i586.
-patch -p1 < $CWD/brlcad-skip-gstep.patch
-sed -i 's%#define OPENNURBS_INC_IN_PROGRESS%#define OPENNURBS_INC_IN_PROGRESS\n\n#define ON_'${ENDIAN}'_ENDIAN%' src/other/openNURBS/opennurbs.h
-
+if [ $(cmake --version |head -1 |cut -f3 -d' ') == "3.21.4" ]; then
+    echo "export PATH for cmake-opt"
+    export PATH="/opt/cmake-opt/bin/:$PATH"
+fi
 
 mkdir -p build
 cd build
 # There is a "known issue" according to the guys on #brlcad and we need
 # the cmake define "-DBRLCAD_ENABLE_STRICT=OFF" for now
 cmake \
-    -DBRLCAD_BUNDLED_LIBS=AUTO \
+    -DBRLCAD_BUNDLED_LIBS=ON \
     -DBRLCAD_ENABLE_OPENGL=ON \
     -DBRLCAD_ENABLE_RUNTIME_DEBUG=${BRLCAD_ENABLE_RUNTIME_DEBUG:-ON} \
     -DBRLCAD_FLAGS_DEBUG=OFF \
diff --git a/graphics/brlcad/brlcad.info b/graphics/brlcad/brlcad.info
index 18235da774c..5fcd5b66971 100644
--- a/graphics/brlcad/brlcad.info
+++ b/graphics/brlcad/brlcad.info
@@ -1,10 +1,10 @@
 PRGNAM="brlcad"
-VERSION="7.38.2"
+VERSION="7.42.0"
 HOMEPAGE="https://brlcad.org"
-DOWNLOAD="https://github.com/BRL-CAD/brlcad/archive/rel-7-38-2/brlcad-7-38-2.tar.gz"
-MD5SUM="658a363c6064532bf17cba5924cab7f1"
+DOWNLOAD="https://github.com/BRL-CAD/brlcad/archive/rel-7-42-0/brlcad-rel-7-42-0.tar.gz"
+MD5SUM="f31109c8adf2a5dea7c5a196e663b648"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
-REQUIRES=""
+REQUIRES="cmake-opt"
 MAINTAINER="Yth - Arnaud"
 EMAIL="yth@ythogtha.org"