diff --git a/build-constraints.yaml b/build-constraints.yaml
index 627a3773..31fc5b1e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -817,10 +817,8 @@ packages:
         - language-ecmascript
 
     "Tom Ellis <tom-stackage@jaguarpaw.co.uk>":
-        []
         # GHC 8 - opaleye
-        # https://github.com/tomjaguarpaw/product-profunctors/issues/16
-        # GHC 8 - product-profunctors
+        - product-profunctors
 
     "Samplecount stefan@samplecount.com @kaoskorobase":
         - shake-language-c
@@ -965,8 +963,7 @@ packages:
         - language-c-quote
 
     "Sönke Hahn soenkehahn@gmail.com @soenkehahn":
-        # https://github.com/soenkehahn/generics-eot/issues/4
-        # GHC 8 - generics-eot
+        - generics-eot
         - getopt-generics
         - graph-wrapper
         - string-conversions
@@ -1142,10 +1139,9 @@ packages:
         - generics-sop
 
     "Vivian McPhail <haskell.vivian.mcphail@gmail.com> @amcphail":
-        # https://github.com/albertoruiz/hmatrix/issues/192
-        # GHC 8 - hmatrix-gsl-stats
-        # GHC 8 - hsignal
-        # GHC 8 - hstatistics
+        - hmatrix-gsl-stats
+        - hsignal
+        - hstatistics
         # GHC 8 - plot
         # GHC 8 - plot-gtk
         # GHC 8 - plot-gtk3
@@ -2814,9 +2810,6 @@ expected-test-failures:
     # https://gitlab.com/twittner/swagger/issues/6
     - swagger
 
-    # https://github.com/peti/language-nix/issues/2
-    - language-nix
-
     # https://github.com/thoughtpolice/hs-ed25519/issues/15
     - ed25519