diff --git a/biology/unikmer/Makefile b/biology/unikmer/Makefile
index 2a0abf953a45..9f004c0432fb 100644
--- a/biology/unikmer/Makefile
+++ b/biology/unikmer/Makefile
@@ -1,31 +1,31 @@
 PORTNAME=	unikmer
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.18.4
+DISTVERSION=	0.18.8
 CATEGORIES=	biology
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Toolkit for nucleic acid k-mer analysis, set operations on k-mers
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 TEST_DEPENDS=	csvtk:science/csvtk
 
 USES=		go:modules perl5
 USE_PERL5=	test
 
 GO_MODULE=	github.com/shenwei356/unikmer
 GO_TARGET=	./${PORTNAME}
 
 PLIST_FILES=	bin/${PORTNAME}
 
 do-test: # from the benchmark section in README
 	@cd ${WRKSRC} && \
 		${GO_CMD} test . -bench=Bench* -benchmem \
 			| ${GREP} Bench \
-			| perl -pe 's/\s\s+/\t/g' \
+			| ${PERL} -pe 's/\s\s+/\t/g' \
 			| csvtk cut -Ht -f 1,3-5 \
 			| csvtk add-header -t -n test,time,memory,allocs \
 			| csvtk pretty -t -r
 
 .include <bsd.port.mk>
diff --git a/biology/unikmer/distinfo b/biology/unikmer/distinfo
index fa2ec4660e14..838a51729d65 100644
--- a/biology/unikmer/distinfo
+++ b/biology/unikmer/distinfo
@@ -1,5 +1,5 @@
-TIMESTAMP = 1629820531
-SHA256 (go/biology_unikmer/unikmer-v0.18.4/v0.18.4.mod) = 956b67a0534170f141452b9756e629f91eb3fdd5dcb5fe02ad20b14cd3dceafa
-SIZE (go/biology_unikmer/unikmer-v0.18.4/v0.18.4.mod) = 881
-SHA256 (go/biology_unikmer/unikmer-v0.18.4/v0.18.4.zip) = cb2a3d4eb307b1a421243eeb9d7db217d575c0761998565a980703eeea1e19ce
-SIZE (go/biology_unikmer/unikmer-v0.18.4/v0.18.4.zip) = 4271857
+TIMESTAMP = 1632645188
+SHA256 (go/biology_unikmer/unikmer-v0.18.8/v0.18.8.mod) = 6f5343b0e664ae8df7e07b17711d4a25ee05593031895d7502f50aec47037a13
+SIZE (go/biology_unikmer/unikmer-v0.18.8/v0.18.8.mod) = 1199
+SHA256 (go/biology_unikmer/unikmer-v0.18.8/v0.18.8.zip) = 36a172ba34393ca728fb37867ad6b8c8812118d2ecfa65541c7b825401a99485
+SIZE (go/biology_unikmer/unikmer-v0.18.8/v0.18.8.zip) = 4279549