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-rw-r--r--gnu/packages/ebook.scm1
1 files changed, 1 insertions, 0 deletions
diff --git a/gnu/packages/ebook.scm b/gnu/packages/ebook.scm
index a8c6f5975b..659ec57d50 100644
--- a/gnu/packages/ebook.scm
+++ b/gnu/packages/ebook.scm
@@ -116,6 +116,7 @@
("libusb" ,libusb)
("libxrender" ,libxrender)
("openssl" ,openssl)
+ ("optipng" ,optipng)
("podofo" ,podofo)
("poppler" ,poppler)
("python" ,python-2)