diff --git a/docs/BUILD-INSTRUCTIONS-LINUX.md b/docs/BUILD-INSTRUCTIONS-LINUX.md
index 8cbcce5..8f19722 100644
--- a/docs/BUILD-INSTRUCTIONS-LINUX.md
+++ b/docs/BUILD-INSTRUCTIONS-LINUX.md
@@ -38,13 +38,25 @@ _QREncode (Optional)_
 sudo apt install pkgconf libqrencode-dev
 ```
 _Zint (Optional)_
+
+Install zint from source:
 ```
 wget https://downloads.sourceforge.net/project/zint/zint/2.6.3/zint-2.6.3_final.tar.gz
 tar xzf zint-2.6.3_final.tar.gz
-cd zint-2.6.3.src
+cd zint-2.6.3.src/
 mkdir build && cd build && cmake .. && make
 sudo make install
 ```
+_GNU Barcode (Optional)_
+
+As of version 0.99, GNU Barcode no longer installs its library.  So install 0.98 from source:
+```
+wget https://ftp.gnu.org/gnu/barcode/barcode-0.98.tar.gz
+tar xzf barcode-0.98.tar.gz
+cd barcode-0.98/
+./configure && make
+sudo make install
+```
 ### Compile and Install gLabels
 
 ```