diff --git a/.SRCINFO b/.SRCINFO
index 2713007..22a5101 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,7 +1,7 @@
 pkgbase = superslicer-prerelease
 	pkgdesc = G-code generator for 3D printers (RepRap, Makerbot, Ultimaker etc.)
 	pkgver = 2.3.57.5
-	pkgrel = 1
+	pkgrel = 2
 	epoch = 1
 	url = https://github.com/supermerill/SuperSlicer
 	arch = x86_64
@@ -10,6 +10,7 @@ pkgbase = superslicer-prerelease
 	makedepends = cmake
 	makedepends = ninja
 	makedepends = eigen
+	makedepends = imath
 	makedepends = libigl
 	makedepends = openvdb
 	makedepends = boost>=1.73.0
diff --git a/PKGBUILD b/PKGBUILD
index 7aae8b4..b7e586a 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -3,7 +3,7 @@
 pkgname=superslicer-prerelease
 pkgver=2.3.57.5
 _pkgtag=$pkgver
-pkgrel=1
+pkgrel=2
 epoch=1
 pkgdesc="G-code generator for 3D printers (RepRap, Makerbot, Ultimaker etc.)"
 arch=("$CARCH")
@@ -12,7 +12,7 @@ license=('AGPL3')
 options=(!emptydirs)
 depends=('cgal' 'glew' 'nlopt' 'openvdb' 'wxgtk3-dev-314-opt' 'boost-libs>=1.73.0' 'qhull>=2020.2-4')
 replaces=('slic3r++')
-makedepends=('cereal' 'cmake' 'ninja' 'eigen' 'libigl' 'openvdb' 'boost>=1.73.0' 'wxgtk2-dev-314-opt') # cmake doesn't detect wx if not both gtk2 and gtk3 are installed
+makedepends=('cereal' 'cmake' 'ninja' 'eigen' 'imath' 'libigl' 'openvdb' 'boost>=1.73.0' 'wxgtk2-dev-314-opt') # cmake doesn't detect wx if not both gtk2 and gtk3 are installed
 optdepends=('superslicer-profiles: Predefined printer profiles')
 provides=("superslicer=$epoch:$pkgver")
 conflicts=('superslicer' 'superslicer-git')