diff --git a/recipes/rpsbproc/build.sh b/recipes/rpsbproc/build.sh
index dbaea1d1ac5e7..a152fae34917c 100755
--- a/recipes/rpsbproc/build.sh
+++ b/recipes/rpsbproc/build.sh
@@ -125,9 +125,11 @@ CONFIGURE_FLAGS="$CONFIGURE_FLAGS --without-dll --with-static-exe"
 # Platform-specific flags
 if [[ "$(uname)" = "Linux" ]]; then
 	# --with(out)-64:
-	#   Compile in 64-bit mode instead of 32-bit.
+	#   Compile in 64-bit mode instead of 32-bit on x86_64 platforms.
 	#   Flag not available for osx build.
-	CONFIGURE_FLAGS="$CONFIGURE_FLAGS --with-64"
+        if [[ "$(arch)" = "x86_64" ]]; then
+	    CONFIGURE_FLAGS="$CONFIGURE_FLAGS --with-64"
+	fi
 	# --with(out)-openmp:
 	#   Enable OpenMP extensions for all projects.
 	#   Does not work without hacks for OSX
@@ -154,7 +156,7 @@ cd "$NCBI_CXX_TOOLKIT"
 # Run GNU Make
 cd "$RESULT_PATH/build"
 echo "RUNNING MAKE" >&2
-make -j1 -f Makefile.flat rpsbproc.exe >&2
+make -j 4 -f Makefile.flat rpsbproc.exe >&2
 
 # Copy compiled binaries to the Conda $PREFIX
 mkdir -p "$PREFIX/bin"
diff --git a/recipes/rpsbproc/meta.yaml b/recipes/rpsbproc/meta.yaml
index e6f28433383b3..6f42c04bad539 100644
--- a/recipes/rpsbproc/meta.yaml
+++ b/recipes/rpsbproc/meta.yaml
@@ -24,7 +24,7 @@ source:
       - update_configsub.patch
 
 build:
-  number: 0
+  number: 1
   run_exports:
     - {{ pin_subpackage(name, max_pin="x.x") }}
 
@@ -81,3 +81,7 @@ about:
 extra:
   identifiers:
     - doi:10.1002/cpbi.90
+  additional-platforms:
+    - linux-aarch64
+    # osx-arm64 is encountering issues with Xcode and make during builds
+    # - osx-arm64