diff --git a/net-mgmt/nfs-exporter/Makefile b/net-mgmt/nfs-exporter/Makefile
index 968c278db13d..d86764cf9b49 100644
--- a/net-mgmt/nfs-exporter/Makefile
+++ b/net-mgmt/nfs-exporter/Makefile
@@ -1,109 +1,113 @@
 PORTNAME=	nfs-exporter
 DISTVERSION=	0.3.2
 PORTREVISION=	2
 CATEGORIES=	net-mgmt
 MASTER_SITES=	CRATESIO
 MASTER_SITE_SUBDIR=	freebsd-${PORTNAME}/${DISTVERSION}
 DISTNAME=	freebsd-${PORTNAME}-${DISTVERSIONFULL}
 DISTFILES=	${CARGO_DIST_SUBDIR}/${DISTNAME}${CARGO_CRATE_EXT}
 
 MAINTAINER=	asomers@FreeBSD.org
 COMMENT=	Prometheus exporter for NFS statistics
 WWW=		https://github.com/Axcient/freebsd-nfs-exporter
 
 LICENSE=	APACHE20 MIT
 LICENSE_COMB=	dual
 LICENSE_FILE_APACHE20=	${WRKSRC}/LICENSE-APACHE
 LICENSE_FILE_MIT=	${WRKSRC}/LICENSE-MIT
 
+# https://github.com/tikv/rust-prometheus/issues/315
+NOT_FOR_ARCHS=	powerpc
+NOT_FOR_ARCHS_REASON_powerpc=needs 64-bit atomics
+
 BUILD_DEPENDS=	llvm-config${LLVM_DEFAULT}:devel/llvm${LLVM_DEFAULT}
 
 USES=		cargo
 USE_RC_SUBR=	nfs_exporter
 
 .include <bsd.port.options.mk>
 
 .if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400073
 SUB_LIST=	USER=nobody
 .else
 SUB_LIST=	USER=root
 .endif
 
 CARGO_CRATES=	aho-corasick-0.7.18 \
 		ascii-1.0.0 \
 		atty-0.2.14 \
 		autocfg-1.1.0 \
 		bindgen-0.60.1 \
 		bitflags-1.3.2 \
 		cexpr-0.6.0 \
 		cfg-if-1.0.0 \
 		chunked_transfer-1.4.0 \
 		clang-sys-1.3.1 \
 		clap-3.2.23 \
 		clap_lex-0.2.4 \
 		either-1.6.1 \
 		env_logger-0.9.0 \
 		fnv-1.0.7 \
 		form_urlencoded-1.0.1 \
 		glob-0.3.0 \
 		hashbrown-0.12.3 \
 		hermit-abi-0.1.19 \
 		humantime-2.1.0 \
 		idna-0.2.3 \
 		indexmap-1.9.1 \
 		instant-0.1.12 \
 		itoa-1.0.1 \
 		lazy_static-1.4.0 \
 		lazycell-1.3.0 \
 		libc-0.2.120 \
 		libloading-0.7.3 \
 		lock_api-0.4.6 \
 		log-0.4.14 \
 		matches-0.1.9 \
 		memchr-2.4.1 \
 		minimal-lexical-0.2.1 \
 		nom-7.1.1 \
 		num_threads-0.1.4 \
 		os_str_bytes-6.3.1 \
 		parking_lot-0.11.2 \
 		parking_lot_core-0.8.5 \
 		peeking_take_while-0.1.2 \
 		percent-encoding-2.1.0 \
 		proc-macro2-1.0.36 \
 		prometheus-0.13.0 \
 		prometheus_exporter-0.8.4 \
 		quote-1.0.15 \
 		redox_syscall-0.2.11 \
 		regex-1.5.5 \
 		regex-syntax-0.6.25 \
 		rustc-hash-1.1.0 \
 		scopeguard-1.1.0 \
 		shlex-1.1.0 \
 		smallvec-1.8.0 \
 		strsim-0.10.0 \
 		syn-1.0.89 \
 		termcolor-1.1.3 \
 		textwrap-0.16.0 \
 		thiserror-1.0.30 \
 		thiserror-impl-1.0.30 \
 		time-0.3.7 \
 		time-macros-0.2.3 \
 		tiny_http-0.10.0 \
 		tinyvec-1.5.1 \
 		tinyvec_macros-0.1.0 \
 		unicode-bidi-0.3.7 \
 		unicode-normalization-0.1.19 \
 		unicode-xid-0.2.2 \
 		url-2.2.2 \
 		which-4.2.4 \
 		winapi-0.3.9 \
 		winapi-i686-pc-windows-gnu-0.4.0 \
 		winapi-util-0.1.5 \
 		winapi-x86_64-pc-windows-gnu-0.4.0
 
 PLIST_FILES=	bin/nfs-exporter
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/bin/nfs-exporter
 
 .include <bsd.port.mk>