diff --git a/Gemfile b/Gemfile
index 8a05e442b..7f667874d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,9 +11,9 @@ gem 'jekyll','~>4.1.0'
 #   https://github.com/0xdevalias/devalias.net/issues/83
 #   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 'classifier-reborn'
+# gem 'nmatrix'
+# 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
   # gem 'jekyll-admin' # using outdated 1.4.x version of sinatra, see https://github.com/jekyll/jekyll-admin/issues/601
diff --git a/Gemfile.lock b/Gemfile.lock
index fc53bf238..7c6bc13d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,9 +3,6 @@ GEM
   specs:
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
-    backports (3.18.1)
-    classifier-reborn (2.2.0)
-      fast-stemmer (~> 1.0)
     colorator (1.1.0)
     commonmarker (0.21.0)
       ruby-enum (~> 0.5)
@@ -16,10 +13,8 @@ GEM
     eventmachine (1.2.7)
     faraday (1.0.1)
       multipart-post (>= 1.2, < 3)
-    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)
@@ -78,13 +73,9 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
     multipart-post (2.1.1)
-    nmatrix (0.2.4)
-      packable (~> 1.3, >= 1.3.5)
     octokit (4.18.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
-    packable (1.3.14)
-      backports
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.5)
@@ -109,8 +100,6 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  classifier-reborn
-  gsl
   jekyll (~> 4.1.0)
   jekyll-commonmark
   jekyll-compose
@@ -126,7 +115,6 @@ DEPENDENCIES
   jekyll-time-to-read
   jekyll-twitter-plugin
   jekyll_version_plugin
-  nmatrix
 
 BUNDLED WITH
    2.1.4
diff --git a/bin/build b/bin/build
index 476ef2018..071f047a1 100755
--- a/bin/build
+++ b/bin/build
@@ -60,4 +60,5 @@ if ! check_site_setup; then
 fi
 
 # Build the Jekyll site
-JEKYLL_ENV=production bundle exec jekyll build --lsi --profile $@
+# JEKYLL_ENV=production bundle exec jekyll build --lsi --profile $@
+JEKYLL_ENV=production bundle exec jekyll build --profile $@