diff --git a/emulators/bochs/Makefile b/emulators/bochs/Makefile
index e827de580bb2..021903f16c91 100644
--- a/emulators/bochs/Makefile
+++ b/emulators/bochs/Makefile
@@ -41,7 +41,7 @@ MAN5=		bochsrc.5
 
 .if defined(WITH_BOCHS_PROCESSORS)
 .if ${WITH_BOCHS_PROCESSORS} < 1 || ${WITH_BOCHS_PROCESSORS} > 15
-.error "WITH_BOCHS_PROCESSORS must be an integer value between 1 and 15."
+IGNORE=	Cannot install: WITH_BOCHS_PROCESSORS must be an integer value between 1 and 15
 .endif
 CONFIGURE_ARGS+=	--enable-processors=${WITH_BOCHS_PROCESSORS}
 WITH_BOCHS_CPU_LEVEL=	6
@@ -49,7 +49,7 @@ WITH_BOCHS_CPU_LEVEL=	6
 
 .if defined(WITH_BOCHS_CPU_LEVEL)
 .if ${WITH_BOCHS_CPU_LEVEL} < 3 || ${WITH_BOCHS_CPU_LEVEL} > 6
-.error "WITH_BOCHS_CPU_LEVEL must be an integer value between 3 and 6."
+IGNORE=	Cannot install: WITH_BOCHS_CPU_LEVEL must be an integer value between 3 and 6
 .endif
 CONFIGURE_ARGS+=	--enable-cpu-level=${WITH_BOCHS_CPU_LEVEL}
 .if ${WITH_BOCHS_CPU_LEVEL} < 5
diff --git a/graphics/xpm/Makefile b/graphics/xpm/Makefile
index d7f483610349..60c78e93c204 100644
--- a/graphics/xpm/Makefile
+++ b/graphics/xpm/Makefile
@@ -23,7 +23,7 @@ INSTALLS_SHLIB=	yes
 MAN1=		cxpm.1 sxpm.1
 
 .ifdef USE_XPM
-.error You have `USE_XPM' variable defined either in environment or in make(1) arguments. Please undefine and try again.
+IGNORE=	Cannot install: you have the `USE_XPM' variable defined either in environment or in make(1) arguments. Please undefine and try again
 .endif
 
 .include <bsd.port.pre.mk>
diff --git a/lang/gcc295/Makefile b/lang/gcc295/Makefile
index d7b9b8f5bd76..12cc2b2d094e 100644
--- a/lang/gcc295/Makefile
+++ b/lang/gcc295/Makefile
@@ -24,7 +24,7 @@ USE_BZIP2=	yes
 LATEST_LINK=	gcc295
 
 .ifdef USE_GCC
-.error You have `USE_GCC' variable defined either in environment or in make(1) arguments. Please undefine and try again.
+IGNORE=	Cannot install: you have the `USE_GCC' variable defined either in environment or in make(1) arguments. Please undefine and try again
 .endif
 
 .include <bsd.port.pre.mk>
diff --git a/mail/websieve/Makefile b/mail/websieve/Makefile
index 88c1c6b36611..c5945ebc7245 100644
--- a/mail/websieve/Makefile
+++ b/mail/websieve/Makefile
@@ -25,7 +25,7 @@ RUN_DEPENDS=	${CYRUS_IMAP_PM}:${PORTSDIR}/mail/cyrus-imapd22
 .elif ${WITH_CYRUS_IMAPD_VER} == 21
 RUN_DEPENDS=	${CYRUS_IMAP_PM}:${PORTSDIR}/mail/cyrus-imapd2
 .else
-.error WITH_CYRUS_IMAPD_VER must be 22 or 21
+IGNORE=	Cannot install: WITH_CYRUS_IMAPD_VER must be 22 or 21
 .endif
 .else
 RUN_DEPENDS=	${SITE_PERL}/IMAP/Admin.pm:${PORTSDIR}/mail/p5-IMAP-Admin \
diff --git a/net/ruby-ldap/Makefile b/net/ruby-ldap/Makefile
index 690a24cd3742..173bb1643ca4 100644
--- a/net/ruby-ldap/Makefile
+++ b/net/ruby-ldap/Makefile
@@ -27,7 +27,7 @@ USE_OPENLDAP=	yes
 .elif ${WITH_LDAP} == ldapsdk
 LIB_DEPENDS=	${LOCALBASE}/mozilla/directory/lib/libldap.so.1:${PORTSDIR}/net/ldapsdk
 .else
-.error WITH_LDAP must be set to one of "openldap1", "openldap2" and "ldapsdk".
+IGNORE=	Cannot install: WITH_LDAP must be set to one of "openldap1", "openldap2" and "ldapsdk"
 .endif
 
 USE_RUBY=	yes
diff --git a/print/freetype/Makefile b/print/freetype/Makefile
index 8d8a1bfa42a8..3d3d6efe2ec1 100644
--- a/print/freetype/Makefile
+++ b/print/freetype/Makefile
@@ -26,7 +26,7 @@ CONFIGURE_ARGS=	--disable-nls --enable-static --enable-shared
 USE_REINPLACE=	yes
 
 .ifdef USE_FREETYPE
-.error You have `USE_FREETYPE' variable defined either in environment or in make(1) arguments. Please undefine and try again.
+IGNORE=	Cannot install: you have the `USE_FREETYPE' variable defined either in environment or in make(1) arguments. Please undefine and try again
 .endif
 
 post-patch:
diff --git a/textproc/sed_inplace/Makefile b/textproc/sed_inplace/Makefile
index 048860cc6eca..e40e4344dd0f 100644
--- a/textproc/sed_inplace/Makefile
+++ b/textproc/sed_inplace/Makefile
@@ -21,7 +21,7 @@ MAKEFILE=	${PKGDIR}/src/Makefile
 MAKE_ENV=	PKGDIR="${PKGDIR}"
 
 .ifdef USE_REINPLACE
-.error You have `USE_REINPLACE' variable defined either in environment or in make(1) arguments. Please undefine and try again.
+IGNORE=	Cannot install: you have `USE_REINPLACE' variable defined either in environment or in make(1) arguments. Please undefine and try again
 .endif
 
 .include <bsd.port.pre.mk>