From d37aceedebb3a2338909d4225fb4e9f09613bd22 Mon Sep 17 00:00:00 2001
From: Unai Martinez-Corral <unai.martinezcorral@ehu.eus>
Date: Tue, 28 Mar 2023 17:44:31 +0200
Subject: [PATCH] Makefile: fix check condition

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index edc464b17..bf7b51caf 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ LATEXDEPS     = latex dvipng
 FILELIST      =
 
 # User-friendly check for sphinx-build
-ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
+ifneq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 0)
 $(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD make variable to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the executable's directory to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
 endif