--- configure.ac.orig	2019-07-31 10:19:06.000000000 -0700
+++ configure.ac	2019-07-31 22:25:30.000000000 -0700
@@ -804,7 +804,7 @@
 fi
 AC_MSG_RESULT($have_glib_2_57)
 
-AC_PATH_PROG(GEGL, gegl, no)
+AC_PATH_PROG(GEGL, gegl-0.4, no)
 if test "x$GEGL" = xno; then
   add_deps_error([gegl], [Could not find native gegl executable in your PATH.])
 fi
@@ -2222,7 +2222,7 @@
 # Check for perl
 ################
 
-AC_PATH_PROGS(PERL,perl5 perl,perl)
+AC_PATH_PROGS(PERL,perl5.28)
 AX_PROG_PERL_VERSION([perl_required_version],,
                      [add_deps_error([perl >= perl_required_version])])
 
@@ -2296,7 +2296,7 @@
 
   # XXX Check here for something related to Python gobject-introspection & GTK3
 
-  PKG_CHECK_MODULES(PYCAIRO, pycairo >= pycairo_required_version,,
+  PKG_CHECK_MODULES(PYCAIRO, py3cairo >= pycairo_required_version,,
                     [pycheck_error([PyCairo pycairo_required_version or newer], [it])])
 
   GIMP_DETECT_CFLAGS(PYGIMP_EXTRA_CFLAGS, '-fno-strict-aliasing')