diff --git a/dev-python/simplespectral/simplespectral-1.0.0.ebuild b/dev-python/simplespectral/simplespectral-1.0.0.ebuild
index 3e435b3da1..a9a1009646 100644
--- a/dev-python/simplespectral/simplespectral-1.0.0.ebuild
+++ b/dev-python/simplespectral/simplespectral-1.0.0.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -20,7 +20,7 @@ else
 	SRC_URI="https://github.com/xmikos/simplespectral/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 fi
 
-IUSE="faster +fastest"
+IUSE="+faster fastest"
 
 RDEPEND="dev-python/numpy[${PYTHON_USEDEP}]
 		faster? ( dev-python/scipy[${PYTHON_USEDEP}] )
diff --git a/dev-python/simplespectral/simplespectral-9999.ebuild b/dev-python/simplespectral/simplespectral-9999.ebuild
index 3e435b3da1..a9a1009646 100644
--- a/dev-python/simplespectral/simplespectral-9999.ebuild
+++ b/dev-python/simplespectral/simplespectral-9999.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -20,7 +20,7 @@ else
 	SRC_URI="https://github.com/xmikos/simplespectral/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 fi
 
-IUSE="faster +fastest"
+IUSE="+faster fastest"
 
 RDEPEND="dev-python/numpy[${PYTHON_USEDEP}]
 		faster? ( dev-python/scipy[${PYTHON_USEDEP}] )
diff --git a/net-wireless/soapy_power/soapy_power-1.6.1-r1.ebuild b/net-wireless/soapy_power/soapy_power-1.6.1-r1.ebuild
index ae0f14ffbb..95c0093468 100644
--- a/net-wireless/soapy_power/soapy_power-1.6.1-r1.ebuild
+++ b/net-wireless/soapy_power/soapy_power-1.6.1-r1.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -20,7 +20,7 @@ else
 	SRC_URI="https://github.com/xmikos/soapy_power/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 fi
 
-IUSE="faster +fastest"
+IUSE="+faster fastest"
 
 DEPEND=""
 RDEPEND="dev-python/numpy[${PYTHON_USEDEP}]
diff --git a/net-wireless/soapy_power/soapy_power-9999.ebuild b/net-wireless/soapy_power/soapy_power-9999.ebuild
index ae0f14ffbb..95c0093468 100644
--- a/net-wireless/soapy_power/soapy_power-9999.ebuild
+++ b/net-wireless/soapy_power/soapy_power-9999.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -20,7 +20,7 @@ else
 	SRC_URI="https://github.com/xmikos/soapy_power/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 fi
 
-IUSE="faster +fastest"
+IUSE="+faster fastest"
 
 DEPEND=""
 RDEPEND="dev-python/numpy[${PYTHON_USEDEP}]
diff --git a/profiles/pentoo/base/package.use.mask b/profiles/pentoo/base/package.use.mask
index ca448723d0..dc1d5feab3 100644
--- a/profiles/pentoo/base/package.use.mask
+++ b/profiles/pentoo/base/package.use.mask
@@ -73,3 +73,7 @@ net-analyzer/wireshark lto
 
 #this breaks hashcat
 dev-libs/pocl accel
+
+#pyFFTW doesn't support >=cython-3 yet
+dev-python/simplespectral fastest
+net-wireless/soapy_power fastest