diff --git a/libpsl.spec b/libpsl.spec
index 0427e67..6ad46fd 100644
--- a/libpsl.spec
+++ b/libpsl.spec
@@ -14,6 +14,7 @@ BuildRequires:  libidn2-devel
 BuildRequires:  libunistring-devel
 BuildRequires:  libxslt
 BuildRequires:  publicsuffix-list
+BuildRequires:  python3-devel
 Requires:       publicsuffix-list-dafsa
 
 %description
@@ -68,6 +69,7 @@ from a plain text Public Suffix List.
 %prep
 %setup -q
 rm -frv list
+sed -i -e "1s|#!.*|#!%{__python3}|" src/psl-make-dafsa
 
 %build
 # Tarballs from github have 2 versions, one is raw files from repo, and
@@ -103,7 +105,6 @@ rm -frv list
 
 # the script is noinst but the manpage is installed
 install -m0755 src/psl-make-dafsa %{buildroot}%{_bindir}/
-sed -i -e "1s|#!.*|#!/usr/bin/python3|" %{buildroot}%{_bindir}/psl-make-dafsa
 
 find %{buildroot} -name '*.la' -delete -print