diff --git a/src/jansson-2.6/Makefile.am b/src/jansson-2.6/Makefile.am
index 26a85e8f..b70459b3 100644
--- a/src/jansson-2.6/Makefile.am
+++ b/src/jansson-2.6/Makefile.am
@@ -1,16 +1,3 @@
 ACLOCAL_AMFLAGS = -I m4
 EXTRA_DIST = CHANGES LICENSE README.rst
 SUBDIRS = src
-
-# "make distcheck" builds the dvi target, so use it to check that the
-# documentation is built correctly.
-dvi:
-	$(MAKE) SPHINXOPTS_EXTRA=-W html
-
-pkgconfigdir = $(libdir)/pkgconfig
-pkgconfig_DATA = jansson.pc
-
-if GCC
-# These flags are gcc specific
-export AM_CFLAGS = -Wall -Wextra -Wdeclaration-after-statement
-endif
diff --git a/src/jansson-2.6/configure.ac b/src/jansson-2.6/configure.ac
index a2c357dc..4e733bc8 100644
--- a/src/jansson-2.6/configure.ac
+++ b/src/jansson-2.6/configure.ac
@@ -92,7 +92,6 @@ AC_DEFINE([USE_WINDOWS_CRYPTOAPI], [1],
 fi
 
 AC_CONFIG_FILES([
-        jansson.pc
         Makefile
         src/Makefile
         src/jansson_config.h