try removing gsl

Author: 0xdevalias

Gemfile

@@ -12,7 +12,7 @@ gem 'jekyll','~>4.1.0'
 #   https://github.com/jekyll/classifier-reborn/issues/192
 #   https://github.com/SciRuby/rb-gsl/issues/63
 #gem 'nmatrix'
-gem 'gsl' # Note: you need to install a compatible version (eg. 2.1) of gsl first: brew install gsl@2.1
+#gem 'gsl' # Note: you need to install a compatible version (eg. 2.1) of gsl first: brew install gsl@2.1
 gem 'classifier-reborn'
 
 group :jekyll_plugins do

Gemfile.lock

@@ -18,7 +18,6 @@ GEM
     fast-stemmer (1.0.2)
     ffi (1.13.1)
     forwardable-extended (2.6.0)
-    gsl (2.1.0.3)
     http_parser.rb (0.6.0)
     i18n (1.8.4)
       concurrent-ruby (~> 1.0)
@@ -105,7 +104,6 @@ PLATFORMS
 
 DEPENDENCIES
   classifier-reborn
-  gsl
   jekyll (~> 4.1.0)
   jekyll-commonmark
   jekyll-compose